diff --git a/Userland/Libraries/LibWeb/DOM/Element.cpp b/Userland/Libraries/LibWeb/DOM/Element.cpp
index 9870fd4ca81..681e85bc491 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Element.cpp
@@ -37,7 +37,7 @@
 
 namespace Web::DOM {
 
-Element::Element(Document& document, QualifiedName qualified_name)
+Element::Element(Document& document, DOM::QualifiedName qualified_name)
     : ParentNode(document, NodeType::ELEMENT_NODE)
     , m_qualified_name(move(qualified_name))
     , m_attributes(NamedNodeMap::create(*this))
diff --git a/Userland/Libraries/LibWeb/DOM/Element.h b/Userland/Libraries/LibWeb/DOM/Element.h
index d11bd5c963e..5009dfb2edc 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.h
+++ b/Userland/Libraries/LibWeb/DOM/Element.h
@@ -32,7 +32,7 @@ class Element
 public:
     using WrapperType = Bindings::ElementWrapper;
 
-    Element(Document&, QualifiedName);
+    Element(Document&, DOM::QualifiedName);
     virtual ~Element() override;
 
     const String& qualified_name() const { return m_qualified_name.as_string(); }
diff --git a/Userland/Libraries/LibWeb/DOM/QualifiedName.h b/Userland/Libraries/LibWeb/DOM/QualifiedName.h
index c7c429d2d33..8a63e943e7e 100644
--- a/Userland/Libraries/LibWeb/DOM/QualifiedName.h
+++ b/Userland/Libraries/LibWeb/DOM/QualifiedName.h
@@ -8,7 +8,7 @@
 
 #include <AK/FlyString.h>
 
-namespace Web {
+namespace Web::DOM {
 
 class QualifiedName {
 public:
diff --git a/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.cpp b/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.cpp
index 0b20d84290c..8f54c03c2ab 100644
--- a/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.cpp
+++ b/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.cpp
@@ -14,7 +14,7 @@
 
 namespace Web::HTML {
 
-BrowsingContextContainer::BrowsingContextContainer(DOM::Document& document, QualifiedName qualified_name)
+BrowsingContextContainer::BrowsingContextContainer(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.h b/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.h
index 11f64a00c93..968b2e6da2c 100644
--- a/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.h
+++ b/Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.h
@@ -12,7 +12,7 @@ namespace Web::HTML {
 
 class BrowsingContextContainer : public HTMLElement {
 public:
-    BrowsingContextContainer(DOM::Document&, QualifiedName);
+    BrowsingContextContainer(DOM::Document&, DOM::QualifiedName);
     virtual ~BrowsingContextContainer() override;
 
     BrowsingContext* nested_browsing_context() { return m_nested_browsing_context; }
diff --git a/Userland/Libraries/LibWeb/HTML/FormAssociatedElement.h b/Userland/Libraries/LibWeb/HTML/FormAssociatedElement.h
index bbae4ae5869..4571f3008bb 100644
--- a/Userland/Libraries/LibWeb/HTML/FormAssociatedElement.h
+++ b/Userland/Libraries/LibWeb/HTML/FormAssociatedElement.h
@@ -20,7 +20,7 @@ public:
     void set_form(HTMLFormElement*);
 
 protected:
-    FormAssociatedElement(DOM::Document& document, QualifiedName qualified_name)
+    FormAssociatedElement(DOM::Document& document, DOM::QualifiedName qualified_name)
         : HTMLElement(document, move(qualified_name))
     {
     }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
index 9817944ceeb..fca23d89a47 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLAnchorElement::HTMLAnchorElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLAnchorElement::HTMLAnchorElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.h b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.h
index 8930da4949d..0d35bae7e71 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.h
@@ -17,7 +17,7 @@ class HTMLAnchorElement final
 public:
     using WrapperType = Bindings::HTMLAnchorElementWrapper;
 
-    HTMLAnchorElement(DOM::Document&, QualifiedName);
+    HTMLAnchorElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLAnchorElement() override;
 
     String target() const { return attribute(HTML::AttributeNames::target); }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.cpp
index e5e95d0be48..32cd3390378 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLAreaElement::HTMLAreaElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLAreaElement::HTMLAreaElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h
index 67283932e96..df7a662d813 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h
@@ -18,7 +18,7 @@ class HTMLAreaElement final
 public:
     using WrapperType = Bindings::HTMLAreaElementWrapper;
 
-    HTMLAreaElement(DOM::Document&, QualifiedName);
+    HTMLAreaElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLAreaElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.cpp
index 69d21aaddd9..213cd99fb81 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLAudioElement::HTMLAudioElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLAudioElement::HTMLAudioElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLMediaElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.h b/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.h
index 35a9bb514ba..498d43cdcf5 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAudioElement.h
@@ -14,7 +14,7 @@ class HTMLAudioElement final : public HTMLMediaElement {
 public:
     using WrapperType = Bindings::HTMLAudioElementWrapper;
 
-    HTMLAudioElement(DOM::Document&, QualifiedName);
+    HTMLAudioElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLAudioElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.cpp
index d3cda9ca7c3..3180804aabe 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLBRElement::HTMLBRElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLBRElement::HTMLBRElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.h b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.h
index 5348a6f84fe..0c8b911158c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.h
@@ -14,7 +14,7 @@ class HTMLBRElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLBRElementWrapper;
 
-    HTMLBRElement(DOM::Document&, QualifiedName);
+    HTMLBRElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLBRElement() override;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.cpp
index 7444371acac..6439cee064f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLBaseElement::HTMLBaseElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLBaseElement::HTMLBaseElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.h b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.h
index f9aabb44741..de620b86a9f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.h
@@ -14,7 +14,7 @@ class HTMLBaseElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLBaseElementWrapper;
 
-    HTMLBaseElement(DOM::Document&, QualifiedName);
+    HTMLBaseElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLBaseElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.cpp
index 53d02fe344a..b4466274f59 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLBlinkElement::HTMLBlinkElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLBlinkElement::HTMLBlinkElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
     , m_timer(Core::Timer::construct())
 {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.h b/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.h
index 03ef5512723..1a4cf3d456c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.h
@@ -13,7 +13,7 @@ namespace Web::HTML {
 
 class HTMLBlinkElement final : public HTMLElement {
 public:
-    HTMLBlinkElement(DOM::Document&, QualifiedName);
+    HTMLBlinkElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLBlinkElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp
index ca2c769f972..4110f9a895a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp
@@ -12,7 +12,7 @@
 
 namespace Web::HTML {
 
-HTMLBodyElement::HTMLBodyElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLBodyElement::HTMLBodyElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.h b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.h
index 14b036af1e6..9bbb48ec2fd 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.h
@@ -14,7 +14,7 @@ class HTMLBodyElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLBodyElementWrapper;
 
-    HTMLBodyElement(DOM::Document&, QualifiedName);
+    HTMLBodyElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLBodyElement() override;
 
     virtual void parse_attribute(const FlyString&, const String&) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.cpp
index 83af70fe288..b1926428bcf 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLButtonElement::HTMLButtonElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLButtonElement::HTMLButtonElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.h b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.h
index 840553325e1..6c4723c9a2e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.h
@@ -14,7 +14,7 @@ class HTMLButtonElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLButtonElementWrapper;
 
-    HTMLButtonElement(DOM::Document&, QualifiedName);
+    HTMLButtonElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLButtonElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp
index ec27e7b7e2c..c2565e7ddf2 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp
@@ -18,7 +18,7 @@ namespace Web::HTML {
 
 static constexpr auto max_canvas_area = 16384 * 16384;
 
-HTMLCanvasElement::HTMLCanvasElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLCanvasElement::HTMLCanvasElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.h b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.h
index a80722aa2e4..d242c12adfa 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.h
@@ -16,7 +16,7 @@ class HTMLCanvasElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLCanvasElementWrapper;
 
-    HTMLCanvasElement(DOM::Document&, QualifiedName);
+    HTMLCanvasElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLCanvasElement() override;
 
     const Gfx::Bitmap* bitmap() const { return m_bitmap; }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.cpp
index cf3a6833369..fe8f12b01d6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDListElement::HTMLDListElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDListElement::HTMLDListElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.h
index e00bc561129..3664d3d32a7 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.h
@@ -14,7 +14,7 @@ class HTMLDListElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDListElementWrapper;
 
-    HTMLDListElement(DOM::Document&, QualifiedName);
+    HTMLDListElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDListElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.cpp
index 17b48881ae3..8766e3b8ec2 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDataElement::HTMLDataElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDataElement::HTMLDataElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.h
index 3285f42c524..3270881f21d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.h
@@ -14,7 +14,7 @@ class HTMLDataElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDataElementWrapper;
 
-    HTMLDataElement(DOM::Document&, QualifiedName);
+    HTMLDataElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDataElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.cpp
index 9114b7410da..6d652b6ea63 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDataListElement::HTMLDataListElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDataListElement::HTMLDataListElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.h
index 6c52841ef45..d7af3b3141b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDataListElement.h
@@ -14,7 +14,7 @@ class HTMLDataListElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDataListElementWrapper;
 
-    HTMLDataListElement(DOM::Document&, QualifiedName);
+    HTMLDataListElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDataListElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.cpp
index b1748f9d90d..120d9e6523a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDetailsElement::HTMLDetailsElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDetailsElement::HTMLDetailsElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.h
index 808b699aa96..9929e1e712d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.h
@@ -14,7 +14,7 @@ class HTMLDetailsElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDetailsElementWrapper;
 
-    HTMLDetailsElement(DOM::Document&, QualifiedName);
+    HTMLDetailsElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDetailsElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
index e30cb37dec0..2464a664729 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDialogElement::HTMLDialogElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDialogElement::HTMLDialogElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.h
index f82b4297e6f..8684fb8ca6b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.h
@@ -14,7 +14,7 @@ class HTMLDialogElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDialogElementWrapper;
 
-    HTMLDialogElement(DOM::Document&, QualifiedName);
+    HTMLDialogElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDialogElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.cpp
index 0b8f43c37d3..bd0782c88fe 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDirectoryElement::HTMLDirectoryElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDirectoryElement::HTMLDirectoryElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.h
index c81662c0114..460415684d0 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.h
@@ -15,7 +15,7 @@ class HTMLDirectoryElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDirectoryElementWrapper;
 
-    HTMLDirectoryElement(DOM::Document&, QualifiedName);
+    HTMLDirectoryElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDirectoryElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.cpp
index 7fc5c6da0d4..c59bdeb34f2 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLDivElement::HTMLDivElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLDivElement::HTMLDivElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.h b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.h
index b177fe13f24..01a28bf2d37 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.h
@@ -14,7 +14,7 @@ class HTMLDivElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLDivElementWrapper;
 
-    HTMLDivElement(DOM::Document&, QualifiedName);
+    HTMLDivElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLDivElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
index b19dfdc6fb5..68fe0fde741 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
@@ -26,7 +26,7 @@
 
 namespace Web::HTML {
 
-HTMLElement::HTMLElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLElement::HTMLElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : Element(document, move(qualified_name))
     , m_dataset(DOMStringMap::create(*this))
 {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.h b/Userland/Libraries/LibWeb/HTML/HTMLElement.h
index 5240025a2a5..0110ff7a889 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.h
@@ -19,7 +19,7 @@ class HTMLElement
 public:
     using WrapperType = Bindings::HTMLElementWrapper;
 
-    HTMLElement(DOM::Document&, QualifiedName);
+    HTMLElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLElement() override;
 
     String title() const { return attribute(HTML::AttributeNames::title); }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.cpp
index 0f5f1b917c5..89dc39ec9e4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLEmbedElement::HTMLEmbedElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLEmbedElement::HTMLEmbedElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.h b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.h
index e5f0fea14a8..4c68838800d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.h
@@ -14,7 +14,7 @@ class HTMLEmbedElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLEmbedElementWrapper;
 
-    HTMLEmbedElement(DOM::Document&, QualifiedName);
+    HTMLEmbedElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLEmbedElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.cpp
index aecbcf30c7a..2dcc97e37ee 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLFieldSetElement::HTMLFieldSetElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLFieldSetElement::HTMLFieldSetElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.h b/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.h
index 9e645510a36..f9295cab592 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.h
@@ -14,7 +14,7 @@ class HTMLFieldSetElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLFieldSetElementWrapper;
 
-    HTMLFieldSetElement(DOM::Document&, QualifiedName);
+    HTMLFieldSetElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLFieldSetElement() override;
 
     const String& type() const
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.cpp
index 3a2b5821c40..7f19f604a9f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLFontElement::HTMLFontElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLFontElement::HTMLFontElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.h b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.h
index 7b81aeec71c..401019fde1d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.h
@@ -14,7 +14,7 @@ class HTMLFontElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLFontElementWrapper;
 
-    HTMLFontElement(DOM::Document&, QualifiedName);
+    HTMLFontElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLFontElement() override;
 
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
index 4de76994a0a..00e3a55113b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
@@ -16,7 +16,7 @@
 
 namespace Web::HTML {
 
-HTMLFormElement::HTMLFormElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLFormElement::HTMLFormElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.h b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.h
index 966dbbebe7e..618b94756bb 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.h
@@ -15,7 +15,7 @@ class HTMLFormElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLFormElementWrapper;
 
-    HTMLFormElement(DOM::Document&, QualifiedName);
+    HTMLFormElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLFormElement() override;
 
     String action() const;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.cpp
index 8bd19787420..c5163a9da86 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLFrameElement::HTMLFrameElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLFrameElement::HTMLFrameElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.h b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.h
index 865f482792e..39087a69698 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.h
@@ -15,7 +15,7 @@ class HTMLFrameElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLFrameElementWrapper;
 
-    HTMLFrameElement(DOM::Document&, QualifiedName);
+    HTMLFrameElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLFrameElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.cpp
index 6d032533420..a04fe951465 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLFrameSetElement::HTMLFrameSetElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLFrameSetElement::HTMLFrameSetElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.h b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.h
index a5b3afd627f..998bb606378 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.h
@@ -15,7 +15,7 @@ class HTMLFrameSetElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLFrameSetElementWrapper;
 
-    HTMLFrameSetElement(DOM::Document&, QualifiedName);
+    HTMLFrameSetElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLFrameSetElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.cpp
index 13807108cfb..faf0d8e535b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLHRElement::HTMLHRElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLHRElement::HTMLHRElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.h b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.h
index f0301b5802a..69f5649ea91 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.h
@@ -14,7 +14,7 @@ class HTMLHRElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLHRElementWrapper;
 
-    HTMLHRElement(DOM::Document&, QualifiedName);
+    HTMLHRElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLHRElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.cpp
index 1c59b7a4bf0..07bc984e427 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLHeadElement::HTMLHeadElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLHeadElement::HTMLHeadElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.h b/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.h
index 9b4c64b49cc..e2faf9a5c65 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHeadElement.h
@@ -14,7 +14,7 @@ class HTMLHeadElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLHeadElementWrapper;
 
-    HTMLHeadElement(DOM::Document&, QualifiedName);
+    HTMLHeadElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLHeadElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.cpp
index 5bf9c5be4d0..3388d36dc31 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLHeadingElement::HTMLHeadingElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLHeadingElement::HTMLHeadingElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.h b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.h
index e4b689cd977..d5c7644a798 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.h
@@ -14,7 +14,7 @@ class HTMLHeadingElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLHeadingElementWrapper;
 
-    HTMLHeadingElement(DOM::Document&, QualifiedName);
+    HTMLHeadingElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLHeadingElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.cpp
index ee5bdbb2f95..af8391e3c56 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLHtmlElement::HTMLHtmlElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLHtmlElement::HTMLHtmlElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
index fac96b510b9..1222355040d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
@@ -14,7 +14,7 @@ class HTMLHtmlElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLHtmlElementWrapper;
 
-    HTMLHtmlElement(DOM::Document&, QualifiedName);
+    HTMLHtmlElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLHtmlElement() override;
 
     bool should_use_body_background_properties() const;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
index 816777ce7d2..ded7d74ee77 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
@@ -13,7 +13,7 @@
 
 namespace Web::HTML {
 
-HTMLIFrameElement::HTMLIFrameElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLIFrameElement::HTMLIFrameElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : BrowsingContextContainer(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
index c934b6590e5..f977d2fe1f6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
@@ -14,7 +14,7 @@ class HTMLIFrameElement final : public BrowsingContextContainer {
 public:
     using WrapperType = Bindings::HTMLIFrameElementWrapper;
 
-    HTMLIFrameElement(DOM::Document&, QualifiedName);
+    HTMLIFrameElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLIFrameElement() override;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp
index 6867740fe9c..dbb71c812e8 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp
@@ -16,7 +16,7 @@
 
 namespace Web::HTML {
 
-HTMLImageElement::HTMLImageElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLImageElement::HTMLImageElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
     , m_image_loader(*this)
 {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.h b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.h
index 6c9c1383161..710db31f206 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.h
@@ -18,7 +18,7 @@ class HTMLImageElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLImageElementWrapper;
 
-    HTMLImageElement(DOM::Document&, QualifiedName);
+    HTMLImageElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLImageElement() override;
 
     virtual void parse_attribute(const FlyString& name, const String& value) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp
index 7a188cf903e..9bc18e12ded 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp
@@ -20,7 +20,7 @@
 
 namespace Web::HTML {
 
-HTMLInputElement::HTMLInputElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLInputElement::HTMLInputElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.h b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.h
index 043877cb9dc..b7085515700 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.h
@@ -41,7 +41,7 @@ class HTMLInputElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLInputElementWrapper;
 
-    HTMLInputElement(DOM::Document&, QualifiedName);
+    HTMLInputElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLInputElement() override;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.cpp
index 7e6d8495ce0..1b938062709 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLLIElement::HTMLLIElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLLIElement::HTMLLIElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.h b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.h
index c86e9767ef9..071f1f8927c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.h
@@ -14,7 +14,7 @@ class HTMLLIElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLLIElementWrapper;
 
-    HTMLLIElement(DOM::Document&, QualifiedName);
+    HTMLLIElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLLIElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp
index 47190d70877..bb7fc135ae6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLLabelElement::HTMLLabelElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLLabelElement::HTMLLabelElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.h b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.h
index bf7982e0154..cae5adb9ce2 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.h
@@ -14,7 +14,7 @@ class HTMLLabelElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLLabelElementWrapper;
 
-    HTMLLabelElement(DOM::Document&, QualifiedName);
+    HTMLLabelElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLLabelElement() override;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.cpp
index 2de2ecf0b20..8cb4aeb0cf9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLLegendElement::HTMLLegendElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLLegendElement::HTMLLegendElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.h b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.h
index 7f3d2ae2f6e..5acdbec2d15 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.h
@@ -14,7 +14,7 @@ class HTMLLegendElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLLegendElementWrapper;
 
-    HTMLLegendElement(DOM::Document&, QualifiedName);
+    HTMLLegendElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLLegendElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
index 57518c3a87c..d638483dadb 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
@@ -16,7 +16,7 @@
 
 namespace Web::HTML {
 
-HTMLLinkElement::HTMLLinkElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLLinkElement::HTMLLinkElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.h b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.h
index c95298bc9e5..9a5153f9dbb 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.h
@@ -19,7 +19,7 @@ class HTMLLinkElement final
 public:
     using WrapperType = Bindings::HTMLLinkElementWrapper;
 
-    HTMLLinkElement(DOM::Document&, QualifiedName);
+    HTMLLinkElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLLinkElement() override;
 
     virtual void inserted() override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.cpp
index 66e5afc7ac9..c1ec6747112 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMapElement::HTMLMapElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMapElement::HTMLMapElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.h
index c21de61c50f..bf66b802399 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.h
@@ -14,7 +14,7 @@ class HTMLMapElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMapElementWrapper;
 
-    HTMLMapElement(DOM::Document&, QualifiedName);
+    HTMLMapElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMapElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.cpp
index a66f6c8b8c2..069f2344f9e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMarqueeElement::HTMLMarqueeElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMarqueeElement::HTMLMarqueeElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.h
index e2150f6a019..556dfa1fae1 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.h
@@ -15,7 +15,7 @@ class HTMLMarqueeElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMarqueeElementWrapper;
 
-    HTMLMarqueeElement(DOM::Document&, QualifiedName);
+    HTMLMarqueeElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMarqueeElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp
index 06751c8ffdf..24f77b793d3 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMediaElement::HTMLMediaElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMediaElement::HTMLMediaElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h
index 83884a9d408..d8cefc19c69 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h
@@ -14,7 +14,7 @@ class HTMLMediaElement : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMediaElementWrapper;
 
-    HTMLMediaElement(DOM::Document&, QualifiedName);
+    HTMLMediaElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMediaElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.cpp
index d64eb4abe15..819afe71726 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMenuElement::HTMLMenuElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMenuElement::HTMLMenuElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.h
index 03bbac480cf..f05e3ab935a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.h
@@ -14,7 +14,7 @@ class HTMLMenuElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMenuElementWrapper;
 
-    HTMLMenuElement(DOM::Document&, QualifiedName);
+    HTMLMenuElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMenuElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.cpp
index d3d5803cbff..9686c2f77ce 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMetaElement::HTMLMetaElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMetaElement::HTMLMetaElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.h
index 3e1c340155d..0e2a7e18838 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.h
@@ -14,7 +14,7 @@ class HTMLMetaElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMetaElementWrapper;
 
-    HTMLMetaElement(DOM::Document&, QualifiedName);
+    HTMLMetaElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMetaElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.cpp
index 6f932700f45..e9ab30307e9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLMeterElement::HTMLMeterElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLMeterElement::HTMLMeterElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h b/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h
index f266cad6dee..bdd8294f7b4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h
@@ -14,7 +14,7 @@ class HTMLMeterElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLMeterElementWrapper;
 
-    HTMLMeterElement(DOM::Document&, QualifiedName);
+    HTMLMeterElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLMeterElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLModElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLModElement.cpp
index 4937fbb1113..05d53416885 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLModElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLModElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLModElement::HTMLModElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLModElement::HTMLModElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLModElement.h b/Userland/Libraries/LibWeb/HTML/HTMLModElement.h
index 0aff7e8248e..b8126fa1c14 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLModElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLModElement.h
@@ -14,7 +14,7 @@ class HTMLModElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLModElementWrapper;
 
-    HTMLModElement(DOM::Document&, QualifiedName);
+    HTMLModElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLModElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.cpp
index 200b213c1d4..7970108bf67 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLOListElement::HTMLOListElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLOListElement::HTMLOListElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.h b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.h
index 151990af41c..25eb96b4861 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.h
@@ -14,7 +14,7 @@ class HTMLOListElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLOListElementWrapper;
 
-    HTMLOListElement(DOM::Document&, QualifiedName);
+    HTMLOListElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLOListElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp
index 657893720f3..3c46719973a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp
@@ -14,7 +14,7 @@
 
 namespace Web::HTML {
 
-HTMLObjectElement::HTMLObjectElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLObjectElement::HTMLObjectElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
     , m_image_loader(*this)
 {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.h b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.h
index 8b1e844e653..f4c51506bf0 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.h
@@ -17,7 +17,7 @@ class HTMLObjectElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLObjectElementWrapper;
 
-    HTMLObjectElement(DOM::Document&, QualifiedName);
+    HTMLObjectElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLObjectElement() override;
 
     virtual void parse_attribute(const FlyString& name, const String& value) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.cpp
index 2c226b768c0..68b644f9481 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLOptGroupElement::HTMLOptGroupElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLOptGroupElement::HTMLOptGroupElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.h b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.h
index bf61c021169..dc04138cb1b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.h
@@ -14,7 +14,7 @@ class HTMLOptGroupElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLOptGroupElementWrapper;
 
-    HTMLOptGroupElement(DOM::Document&, QualifiedName);
+    HTMLOptGroupElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLOptGroupElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
index a0852f5923b..c868d5fa24f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLOptionElement::HTMLOptionElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLOptionElement::HTMLOptionElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h
index 2074ebccf6f..f98e174a316 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h
@@ -14,7 +14,7 @@ class HTMLOptionElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLOptionElementWrapper;
 
-    HTMLOptionElement(DOM::Document&, QualifiedName);
+    HTMLOptionElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLOptionElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.cpp
index 238ed1a2b07..4690543a87a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLOutputElement::HTMLOutputElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLOutputElement::HTMLOutputElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.h b/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.h
index 3dd673ce2cd..0c27e18f566 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOutputElement.h
@@ -14,7 +14,7 @@ class HTMLOutputElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLOutputElementWrapper;
 
-    HTMLOutputElement(DOM::Document&, QualifiedName);
+    HTMLOutputElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLOutputElement() override;
 
     const String& type() const
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.cpp
index 61de25ef181..86cdb7cb6a8 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLParagraphElement::HTMLParagraphElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLParagraphElement::HTMLParagraphElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.h b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.h
index ea7eb0d3ee8..9d03daf490f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.h
@@ -14,7 +14,7 @@ class HTMLParagraphElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLParagraphElementWrapper;
 
-    HTMLParagraphElement(DOM::Document&, QualifiedName);
+    HTMLParagraphElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLParagraphElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.cpp
index 40de708fb7c..84ce93e931b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLParamElement::HTMLParamElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLParamElement::HTMLParamElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.h b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.h
index 9f614b58382..e13ae0a2ea6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.h
@@ -14,7 +14,7 @@ class HTMLParamElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLParamElementWrapper;
 
-    HTMLParamElement(DOM::Document&, QualifiedName);
+    HTMLParamElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLParamElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.cpp
index e6f3f423e02..90aa4fd9810 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLPictureElement::HTMLPictureElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLPictureElement::HTMLPictureElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.h b/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.h
index bae5b55b4b4..72bf00d8be5 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLPictureElement.h
@@ -14,7 +14,7 @@ class HTMLPictureElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLPictureElementWrapper;
 
-    HTMLPictureElement(DOM::Document&, QualifiedName);
+    HTMLPictureElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLPictureElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.cpp
index ff4d245baad..ab3f812534e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLPreElement::HTMLPreElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLPreElement::HTMLPreElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.h b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.h
index f0c870eb4e6..9db21317f35 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.h
@@ -14,7 +14,7 @@ class HTMLPreElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLPreElementWrapper;
 
-    HTMLPreElement(DOM::Document&, QualifiedName);
+    HTMLPreElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLPreElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.cpp
index 6162812d8c3..2303b2d3aaf 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLProgressElement::HTMLProgressElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLProgressElement::HTMLProgressElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.h b/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.h
index a6a3706467e..058e8f227e9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLProgressElement.h
@@ -14,7 +14,7 @@ class HTMLProgressElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLProgressElementWrapper;
 
-    HTMLProgressElement(DOM::Document&, QualifiedName);
+    HTMLProgressElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLProgressElement() override;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.cpp
index ca129c98251..e66e990f57e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLQuoteElement::HTMLQuoteElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLQuoteElement::HTMLQuoteElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.h b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.h
index 61a86df09ce..ea25c54144f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.h
@@ -14,7 +14,7 @@ class HTMLQuoteElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLQuoteElementWrapper;
 
-    HTMLQuoteElement(DOM::Document&, QualifiedName);
+    HTMLQuoteElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLQuoteElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
index 6ecae73b9fe..1381ff7e12e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
@@ -19,7 +19,7 @@
 
 namespace Web::HTML {
 
-HTMLScriptElement::HTMLScriptElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLScriptElement::HTMLScriptElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h
index f034c4f0bdc..82dc96e4675 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h
@@ -17,7 +17,7 @@ class HTMLScriptElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLScriptElementWrapper;
 
-    HTMLScriptElement(DOM::Document&, QualifiedName);
+    HTMLScriptElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLScriptElement() override;
 
     bool is_non_blocking() const { return m_non_blocking; }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
index 4e3a6ae1d5a..84cbaabf45c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLSelectElement::HTMLSelectElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLSelectElement::HTMLSelectElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h
index e9b7a7a744a..f58bb1e3bac 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h
@@ -16,7 +16,7 @@ class HTMLSelectElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLSelectElementWrapper;
 
-    HTMLSelectElement(DOM::Document&, QualifiedName);
+    HTMLSelectElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLSelectElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.cpp
index f1874328b52..0633a12447c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLSlotElement::HTMLSlotElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLSlotElement::HTMLSlotElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.h b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.h
index 0426423da58..c0564dc02ff 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.h
@@ -14,7 +14,7 @@ class HTMLSlotElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLSlotElementWrapper;
 
-    HTMLSlotElement(DOM::Document&, QualifiedName);
+    HTMLSlotElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLSlotElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.cpp
index bef98965386..40aefcf5805 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLSourceElement::HTMLSourceElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLSourceElement::HTMLSourceElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.h b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.h
index ee982359b8c..196a6041e73 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.h
@@ -14,7 +14,7 @@ class HTMLSourceElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLSourceElementWrapper;
 
-    HTMLSourceElement(DOM::Document&, QualifiedName);
+    HTMLSourceElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLSourceElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.cpp
index 66b7c8de7d5..eec43d12fcb 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLSpanElement::HTMLSpanElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLSpanElement::HTMLSpanElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.h b/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.h
index ba73499e2a8..aa7b7a1d726 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSpanElement.h
@@ -14,7 +14,7 @@ class HTMLSpanElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLSpanElementWrapper;
 
-    HTMLSpanElement(DOM::Document&, QualifiedName);
+    HTMLSpanElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLSpanElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.cpp
index 06a37f289e7..9728a91c757 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.cpp
@@ -11,7 +11,7 @@
 
 namespace Web::HTML {
 
-HTMLStyleElement::HTMLStyleElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLStyleElement::HTMLStyleElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.h b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.h
index 27ef45762e1..c1a79ba45d3 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.h
@@ -15,7 +15,7 @@ class HTMLStyleElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLStyleElementWrapper;
 
-    HTMLStyleElement(DOM::Document&, QualifiedName);
+    HTMLStyleElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLStyleElement() override;
 
     virtual void children_changed() override;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.cpp
index 61b2ce9bd62..b6f925ede67 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTableCaptionElement::HTMLTableCaptionElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableCaptionElement::HTMLTableCaptionElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.h
index 629ba59d929..c813366dd89 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.h
@@ -14,7 +14,7 @@ class HTMLTableCaptionElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableCaptionElementWrapper;
 
-    HTMLTableCaptionElement(DOM::Document&, QualifiedName);
+    HTMLTableCaptionElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableCaptionElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.cpp
index 68186fcc8bf..344d23bc115 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.cpp
@@ -9,7 +9,7 @@
 
 namespace Web::HTML {
 
-HTMLTableCellElement::HTMLTableCellElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableCellElement::HTMLTableCellElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.h
index 36db71ee343..4fbceaac1e0 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.h
@@ -14,7 +14,7 @@ class HTMLTableCellElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableCellElementWrapper;
 
-    HTMLTableCellElement(DOM::Document&, QualifiedName);
+    HTMLTableCellElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableCellElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.cpp
index c4bad5eafdb..22eb43b7114 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTableColElement::HTMLTableColElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableColElement::HTMLTableColElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.h
index 2c642cc5199..ee60076a199 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.h
@@ -14,7 +14,7 @@ class HTMLTableColElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableColElementWrapper;
 
-    HTMLTableColElement(DOM::Document&, QualifiedName);
+    HTMLTableColElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableColElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.cpp
index de245b2e81a..cbb0045b862 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.cpp
@@ -15,7 +15,7 @@
 
 namespace Web::HTML {
 
-HTMLTableElement::HTMLTableElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableElement::HTMLTableElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.h
index a91a1af20aa..cd166087db6 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.h
@@ -18,7 +18,7 @@ class HTMLTableElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableElementWrapper;
 
-    HTMLTableElement(DOM::Document&, QualifiedName);
+    HTMLTableElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableElement() override;
 
     RefPtr<HTMLTableCaptionElement> caption();
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.cpp
index b291304e090..78af359fd0b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTableRowElement::HTMLTableRowElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableRowElement::HTMLTableRowElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.h
index 7279c202f5d..16408cb81ba 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.h
@@ -14,7 +14,7 @@ class HTMLTableRowElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableRowElementWrapper;
 
-    HTMLTableRowElement(DOM::Document&, QualifiedName);
+    HTMLTableRowElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableRowElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.cpp
index 3e4809d47ac..22698165c86 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTableSectionElement::HTMLTableSectionElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTableSectionElement::HTMLTableSectionElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.h
index cfc1e9531b6..0e83b7681ac 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.h
@@ -14,7 +14,7 @@ class HTMLTableSectionElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTableSectionElementWrapper;
 
-    HTMLTableSectionElement(DOM::Document&, QualifiedName);
+    HTMLTableSectionElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTableSectionElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
index abdfaf46449..28384e281f9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
@@ -9,7 +9,7 @@
 
 namespace Web::HTML {
 
-HTMLTemplateElement::HTMLTemplateElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTemplateElement::HTMLTemplateElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
     m_content = adopt_ref(*new DOM::DocumentFragment(appropriate_template_contents_owner_document(document)));
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.h
index 8382a8ef903..d2eb8509cd5 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTemplateElement.h
@@ -15,7 +15,7 @@ class HTMLTemplateElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTemplateElementWrapper;
 
-    HTMLTemplateElement(DOM::Document&, QualifiedName);
+    HTMLTemplateElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTemplateElement() override;
 
     NonnullRefPtr<DOM::DocumentFragment> content() { return *m_content; }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
index 8d7c55d1ffd..12db1f4d82e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTextAreaElement::HTMLTextAreaElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTextAreaElement::HTMLTextAreaElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : FormAssociatedElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
index 8742a616aa6..43ced3c1173 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
@@ -14,7 +14,7 @@ class HTMLTextAreaElement final : public FormAssociatedElement {
 public:
     using WrapperType = Bindings::HTMLTextAreaElementWrapper;
 
-    HTMLTextAreaElement(DOM::Document&, QualifiedName);
+    HTMLTextAreaElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTextAreaElement() override;
 
     const String& type() const
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.cpp
index 76042d1c3fb..61a8d9b883c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTimeElement::HTMLTimeElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTimeElement::HTMLTimeElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.h
index 729a20d500e..762b495a8ed 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.h
@@ -14,7 +14,7 @@ class HTMLTimeElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTimeElementWrapper;
 
-    HTMLTimeElement(DOM::Document&, QualifiedName);
+    HTMLTimeElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTimeElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
index b87e715b271..f86bc5398cc 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::HTML {
 
-HTMLTitleElement::HTMLTitleElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTitleElement::HTMLTitleElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.h
index d778bc02e10..564401792b9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.h
@@ -14,7 +14,7 @@ class HTMLTitleElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTitleElementWrapper;
 
-    HTMLTitleElement(DOM::Document&, QualifiedName);
+    HTMLTitleElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTitleElement() override;
 
 private:
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.cpp
index ef42066661f..f30233d2667 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLTrackElement::HTMLTrackElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLTrackElement::HTMLTrackElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.h b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.h
index 0ef5eac7f01..2996f6a120a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.h
@@ -14,7 +14,7 @@ class HTMLTrackElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLTrackElementWrapper;
 
-    HTMLTrackElement(DOM::Document&, QualifiedName);
+    HTMLTrackElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLTrackElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.cpp
index 99aa46ac1e0..cee5b3b781b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLUListElement::HTMLUListElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLUListElement::HTMLUListElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.h b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.h
index d81957d0661..d2838c75762 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.h
@@ -14,7 +14,7 @@ class HTMLUListElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLUListElementWrapper;
 
-    HTMLUListElement(DOM::Document&, QualifiedName);
+    HTMLUListElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLUListElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.cpp
index b47c352fc3d..bcd04338b43 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLUnknownElement::HTMLUnknownElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLUnknownElement::HTMLUnknownElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.h b/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.h
index f6745b62e24..6d36dbbc1de 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLUnknownElement.h
@@ -14,7 +14,7 @@ class HTMLUnknownElement final : public HTMLElement {
 public:
     using WrapperType = Bindings::HTMLUnknownElementWrapper;
 
-    HTMLUnknownElement(DOM::Document&, QualifiedName);
+    HTMLUnknownElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLUnknownElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
index ec83caff8c7..cee1fcd47b5 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::HTML {
 
-HTMLVideoElement::HTMLVideoElement(DOM::Document& document, QualifiedName qualified_name)
+HTMLVideoElement::HTMLVideoElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLMediaElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
index 4a8c508b227..de4e292113e 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
@@ -14,7 +14,7 @@ class HTMLVideoElement final : public HTMLMediaElement {
 public:
     using WrapperType = Bindings::HTMLVideoElementWrapper;
 
-    HTMLVideoElement(DOM::Document&, QualifiedName);
+    HTMLVideoElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLVideoElement() override;
 };
 
diff --git a/Userland/Libraries/LibWeb/SVG/SVGCircleElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGCircleElement.cpp
index e5248595795..5516d78e71f 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGCircleElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGCircleElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGCircleElement::SVGCircleElement(DOM::Document& document, QualifiedName qualified_name)
+SVGCircleElement::SVGCircleElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGCircleElement.h b/Userland/Libraries/LibWeb/SVG/SVGCircleElement.h
index cf945aef279..d03820c5bc2 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGCircleElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGCircleElement.h
@@ -14,7 +14,7 @@ class SVGCircleElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGCircleElementWrapper;
 
-    SVGCircleElement(DOM::Document&, QualifiedName);
+    SVGCircleElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGCircleElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGElement.cpp
index 941fdd9add6..4119706dd5c 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGElement.cpp
@@ -8,7 +8,7 @@
 
 namespace Web::SVG {
 
-SVGElement::SVGElement(DOM::Document& document, QualifiedName qualified_name)
+SVGElement::SVGElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : Element(document, move(qualified_name))
     , m_dataset(HTML::DOMStringMap::create(*this))
 {
diff --git a/Userland/Libraries/LibWeb/SVG/SVGElement.h b/Userland/Libraries/LibWeb/SVG/SVGElement.h
index a1827998ff0..0cd75788fe3 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGElement.h
@@ -20,7 +20,7 @@ public:
     NonnullRefPtr<HTML::DOMStringMap> dataset() const { return m_dataset; }
 
 protected:
-    SVGElement(DOM::Document&, QualifiedName);
+    SVGElement(DOM::Document&, DOM::QualifiedName);
 
     NonnullRefPtr<HTML::DOMStringMap> m_dataset;
 };
diff --git a/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.cpp
index 4e2a43bbfde..a989f5c1328 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGEllipseElement::SVGEllipseElement(DOM::Document& document, QualifiedName qualified_name)
+SVGEllipseElement::SVGEllipseElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.h b/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.h
index 4c262cb1e9b..dc415967fbd 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGEllipseElement.h
@@ -14,7 +14,7 @@ class SVGEllipseElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGEllipseElementWrapper;
 
-    SVGEllipseElement(DOM::Document&, QualifiedName);
+    SVGEllipseElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGEllipseElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGGElement.cpp
index aebba55ec6b..20601ea4a8c 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGGElement.cpp
@@ -11,7 +11,7 @@
 
 namespace Web::SVG {
 
-SVGGElement::SVGGElement(DOM::Document& document, QualifiedName qualified_name)
+SVGGElement::SVGGElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGraphicsElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGElement.h b/Userland/Libraries/LibWeb/SVG/SVGGElement.h
index 757a491fcfb..c9cbbecc7a3 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGGElement.h
@@ -14,7 +14,7 @@ class SVGGElement final : public SVGGraphicsElement {
 public:
     using WrapperType = Bindings::SVGPathElementWrapper;
 
-    SVGGElement(DOM::Document&, QualifiedName);
+    SVGGElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGGElement() override = default;
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.cpp
index 38b1ce92d39..6a038af8306 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.cpp
@@ -9,7 +9,7 @@
 
 namespace Web::SVG {
 
-SVGGeometryElement::SVGGeometryElement(DOM::Document& document, QualifiedName qualified_name)
+SVGGeometryElement::SVGGeometryElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGraphicsElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.h b/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.h
index 8dd3776775d..394f9278631 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGGeometryElement.h
@@ -20,7 +20,7 @@ public:
     virtual Gfx::Path& get_path() = 0;
 
 protected:
-    SVGGeometryElement(DOM::Document& document, QualifiedName qualified_name);
+    SVGGeometryElement(DOM::Document& document, DOM::QualifiedName qualified_name);
 };
 
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.cpp
index 5d0322110a3..0cec4e59d19 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGGraphicsElement::SVGGraphicsElement(DOM::Document& document, QualifiedName qualified_name)
+SVGGraphicsElement::SVGGraphicsElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.h b/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.h
index 06c76dd5f23..1443d530dda 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.h
@@ -18,7 +18,7 @@ class SVGGraphicsElement : public SVGElement {
 public:
     using WrapperType = Bindings::SVGGraphicsElementWrapper;
 
-    SVGGraphicsElement(DOM::Document&, QualifiedName);
+    SVGGraphicsElement(DOM::Document&, DOM::QualifiedName);
 
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
 
diff --git a/Userland/Libraries/LibWeb/SVG/SVGLineElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGLineElement.cpp
index b79083ba036..2eada4e70c0 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGLineElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGLineElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGLineElement::SVGLineElement(DOM::Document& document, QualifiedName qualified_name)
+SVGLineElement::SVGLineElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGLineElement.h b/Userland/Libraries/LibWeb/SVG/SVGLineElement.h
index 48b90af4803..ba476efdaa1 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGLineElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGLineElement.h
@@ -14,7 +14,7 @@ class SVGLineElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGLineElementWrapper;
 
-    SVGLineElement(DOM::Document&, QualifiedName);
+    SVGLineElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGLineElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPathElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGPathElement.cpp
index d4723ba21cc..3b3e5cd362d 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPathElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGPathElement.cpp
@@ -83,7 +83,7 @@ namespace Web::SVG {
     }
 }
 
-SVGPathElement::SVGPathElement(DOM::Document& document, QualifiedName qualified_name)
+SVGPathElement::SVGPathElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, move(qualified_name))
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPathElement.h b/Userland/Libraries/LibWeb/SVG/SVGPathElement.h
index 45f0406e8a5..1f1dbfa0603 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPathElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGPathElement.h
@@ -17,7 +17,7 @@ class SVGPathElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGPathElementWrapper;
 
-    SVGPathElement(DOM::Document&, QualifiedName);
+    SVGPathElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGPathElement() override = default;
 
     virtual void parse_attribute(const FlyString& name, const String& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.cpp
index 86d85bc260c..16701fb122b 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGPolygonElement::SVGPolygonElement(DOM::Document& document, QualifiedName qualified_name)
+SVGPolygonElement::SVGPolygonElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.h b/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.h
index 8e3bc1bb164..626b6ee361a 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGPolygonElement.h
@@ -14,7 +14,7 @@ class SVGPolygonElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGPolygonElementWrapper;
 
-    SVGPolygonElement(DOM::Document&, QualifiedName);
+    SVGPolygonElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGPolygonElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.cpp
index a6a58dd2e34..68e8d0e23ba 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGPolylineElement::SVGPolylineElement(DOM::Document& document, QualifiedName qualified_name)
+SVGPolylineElement::SVGPolylineElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.h b/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.h
index cfb5c4df810..396f7873b79 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGPolylineElement.h
@@ -14,7 +14,7 @@ class SVGPolylineElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGPolylineElementWrapper;
 
-    SVGPolylineElement(DOM::Document&, QualifiedName);
+    SVGPolylineElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGPolylineElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGRectElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGRectElement.cpp
index 9086a4c2c90..3822a66689c 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGRectElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGRectElement.cpp
@@ -10,7 +10,7 @@
 
 namespace Web::SVG {
 
-SVGRectElement::SVGRectElement(DOM::Document& document, QualifiedName qualified_name)
+SVGRectElement::SVGRectElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGeometryElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGRectElement.h b/Userland/Libraries/LibWeb/SVG/SVGRectElement.h
index e98b82d52f4..e180deca572 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGRectElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGRectElement.h
@@ -15,7 +15,7 @@ class SVGRectElement final : public SVGGeometryElement {
 public:
     using WrapperType = Bindings::SVGRectElementWrapper;
 
-    SVGRectElement(DOM::Document&, QualifiedName);
+    SVGRectElement(DOM::Document&, DOM::QualifiedName);
     virtual ~SVGRectElement() override = default;
 
     virtual void parse_attribute(FlyString const& name, String const& value) override;
diff --git a/Userland/Libraries/LibWeb/SVG/SVGSVGElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGSVGElement.cpp
index df0e3b937af..96d6178ce30 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGSVGElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGSVGElement.cpp
@@ -15,7 +15,7 @@
 
 namespace Web::SVG {
 
-SVGSVGElement::SVGSVGElement(DOM::Document& document, QualifiedName qualified_name)
+SVGSVGElement::SVGSVGElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : SVGGraphicsElement(document, qualified_name)
 {
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGSVGElement.h b/Userland/Libraries/LibWeb/SVG/SVGSVGElement.h
index d20d633c5b2..7d878760e00 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGSVGElement.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGSVGElement.h
@@ -16,7 +16,7 @@ class SVGSVGElement final : public SVGGraphicsElement {
 public:
     using WrapperType = Bindings::SVGSVGElementWrapper;
 
-    SVGSVGElement(DOM::Document&, QualifiedName);
+    SVGSVGElement(DOM::Document&, DOM::QualifiedName);
 
     virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;