diff --git a/src/ContentCategories/FlowContent.php b/src/ContentCategories/FlowContent.php
new file mode 100644
index 0000000..0316fa3
--- /dev/null
+++ b/src/ContentCategories/FlowContent.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ByJoby\HTML\ContentCategories;
+
+interface FlowContent
+{
+}
diff --git a/src/ContentCategories/HeadingContent.php b/src/ContentCategories/HeadingContent.php
new file mode 100644
index 0000000..9a635e2
--- /dev/null
+++ b/src/ContentCategories/HeadingContent.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ByJoby\HTML\ContentCategories;
+
+interface HeadingContent extends FlowContent
+{
+}
diff --git a/src/ContentCategories/MetadataContent.php b/src/ContentCategories/MetadataContent.php
new file mode 100644
index 0000000..4e99cdb
--- /dev/null
+++ b/src/ContentCategories/MetadataContent.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ByJoby\HTML\ContentCategories;
+
+interface MetadataContent
+{
+}
diff --git a/src/ContentCategories/PhrasingContent.php b/src/ContentCategories/PhrasingContent.php
new file mode 100644
index 0000000..cd78f95
--- /dev/null
+++ b/src/ContentCategories/PhrasingContent.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ByJoby\HTML\ContentCategories;
+
+interface PhrasingContent extends FlowContent
+{
+}
diff --git a/src/ContentCategories/SectioningContent.php b/src/ContentCategories/SectioningContent.php
new file mode 100644
index 0000000..dbf2892
--- /dev/null
+++ b/src/ContentCategories/SectioningContent.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ByJoby\HTML\ContentCategories;
+
+interface SectioningContent extends FlowContent
+{
+}
diff --git a/src/Html5/AbstractTags/AbstractHeaderTag.php b/src/Html5/AbstractTags/AbstractHeaderTag.php
new file mode 100644
index 0000000..e4614f4
--- /dev/null
+++ b/src/Html5/AbstractTags/AbstractHeaderTag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\AbstractTags;
+
+use ByJoby\HTML\ContentCategories\HeadingContent;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+abstract class AbstractHeaderTag extends AbstractContainerTag implements HeadingContent
+{
+}
diff --git a/src/Html5/Tags/ArticleTag.php b/src/Html5/Tags/ArticleTag.php
new file mode 100644
index 0000000..7894350
--- /dev/null
+++ b/src/Html5/Tags/ArticleTag.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\SectioningContent;
+use ByJoby\HTML\DisplayTypes\DisplayBlock;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+class ArticleTag extends AbstractContainerTag implements DisplayBlock, SectioningContent
+{
+    const TAG = 'article';
+}
diff --git a/src/Html5/Tags/AsideTag.php b/src/Html5/Tags/AsideTag.php
new file mode 100644
index 0000000..da82a9e
--- /dev/null
+++ b/src/Html5/Tags/AsideTag.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\SectioningContent;
+use ByJoby\HTML\DisplayTypes\DisplayBlock;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+class AsideTag extends AbstractContainerTag implements DisplayBlock, SectioningContent
+{
+    const TAG = 'aside';
+}
diff --git a/src/Html5/Tags/BaseTag.php b/src/Html5/Tags/BaseTag.php
index fe75289..147e1cb 100644
--- a/src/Html5/Tags/BaseTag.php
+++ b/src/Html5/Tags/BaseTag.php
@@ -2,9 +2,10 @@
 
 namespace ByJoby\HTML\Html5\Tags;
 
+use ByJoby\HTML\ContentCategories\MetadataContent;
 use ByJoby\HTML\Tags\AbstractTag;
 
-class BaseTag extends AbstractTag
+class BaseTag extends AbstractTag implements MetadataContent
 {
     const TAG = 'base';
 
diff --git a/src/Html5/Tags/H1Tag.php b/src/Html5/Tags/H1Tag.php
new file mode 100644
index 0000000..05fed6c
--- /dev/null
+++ b/src/Html5/Tags/H1Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H1Tag extends AbstractHeaderTag
+{
+    const TAG = 'h1';
+}
diff --git a/src/Html5/Tags/H2Tag.php b/src/Html5/Tags/H2Tag.php
new file mode 100644
index 0000000..7d7ffb3
--- /dev/null
+++ b/src/Html5/Tags/H2Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H2Tag extends AbstractHeaderTag
+{
+    const TAG = 'h1';
+}
diff --git a/src/Html5/Tags/H3Tag.php b/src/Html5/Tags/H3Tag.php
new file mode 100644
index 0000000..4d0ccdd
--- /dev/null
+++ b/src/Html5/Tags/H3Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H3Tag extends AbstractHeaderTag
+{
+    const TAG = 'h3';
+}
diff --git a/src/Html5/Tags/H4Tag.php b/src/Html5/Tags/H4Tag.php
new file mode 100644
index 0000000..ada5d47
--- /dev/null
+++ b/src/Html5/Tags/H4Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H4Tag extends AbstractHeaderTag
+{
+    const TAG = 'h4';
+}
diff --git a/src/Html5/Tags/H5Tag.php b/src/Html5/Tags/H5Tag.php
new file mode 100644
index 0000000..703d190
--- /dev/null
+++ b/src/Html5/Tags/H5Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H5Tag extends AbstractHeaderTag
+{
+    const TAG = 'h5';
+}
diff --git a/src/Html5/Tags/H6Tag.php b/src/Html5/Tags/H6Tag.php
new file mode 100644
index 0000000..5f7dbfc
--- /dev/null
+++ b/src/Html5/Tags/H6Tag.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\Html5\AbstractTags\AbstractHeaderTag;
+
+class H6Tag extends AbstractHeaderTag
+{
+    const TAG = 'h6';
+}
diff --git a/src/Html5/Tags/HgroupTag.php b/src/Html5/Tags/HgroupTag.php
new file mode 100644
index 0000000..e45d0bc
--- /dev/null
+++ b/src/Html5/Tags/HgroupTag.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\HeadingContent;
+use ByJoby\HTML\DisplayTypes\DisplayBlock;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+class HgroupTag extends AbstractContainerTag implements DisplayBlock, HeadingContent
+{
+    const TAG = 'hgroup';
+}
diff --git a/src/Html5/Tags/LinkTag.php b/src/Html5/Tags/LinkTag.php
index a14ee59..608a8e4 100644
--- a/src/Html5/Tags/LinkTag.php
+++ b/src/Html5/Tags/LinkTag.php
@@ -2,9 +2,10 @@
 
 namespace ByJoby\HTML\Html5\Tags;
 
+use ByJoby\HTML\ContentCategories\MetadataContent;
 use ByJoby\HTML\Tags\AbstractTag;
 
-class LinkTag extends AbstractTag
+class LinkTag extends AbstractTag implements MetadataContent
 {
     const TAG = 'link';
 
diff --git a/src/Html5/Tags/MetaTag.php b/src/Html5/Tags/MetaTag.php
index fb7e438..8c3d347 100644
--- a/src/Html5/Tags/MetaTag.php
+++ b/src/Html5/Tags/MetaTag.php
@@ -2,9 +2,10 @@
 
 namespace ByJoby\HTML\Html5\Tags;
 
+use ByJoby\HTML\ContentCategories\MetadataContent;
 use ByJoby\HTML\Tags\AbstractTag;
 
-class MetaTag extends AbstractTag
+class MetaTag extends AbstractTag implements MetadataContent
 {
     const TAG = 'meta';
 
diff --git a/src/Html5/Tags/NavTag.php b/src/Html5/Tags/NavTag.php
new file mode 100644
index 0000000..d85520f
--- /dev/null
+++ b/src/Html5/Tags/NavTag.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\SectioningContent;
+use ByJoby\HTML\DisplayTypes\DisplayBlock;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+class NavTag extends AbstractContainerTag implements DisplayBlock, SectioningContent
+{
+    const TAG = 'nav';
+}
diff --git a/src/Html5/Tags/NoscriptTag.php b/src/Html5/Tags/NoscriptTag.php
new file mode 100644
index 0000000..63f89d4
--- /dev/null
+++ b/src/Html5/Tags/NoscriptTag.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\MetadataContent;
+use ByJoby\HTML\ContentCategories\PhrasingContent;
+use ByJoby\HTML\DisplayTypes\DisplayContents;
+use ByJoby\HTML\Tags\AbstractContentTag;
+
+class NoscriptTag extends AbstractContentTag implements MetadataContent, PhrasingContent, DisplayContents
+{
+    const TAG = 'noscript';
+}
diff --git a/src/Html5/Tags/ScriptTag.php b/src/Html5/Tags/ScriptTag.php
new file mode 100644
index 0000000..a575389
--- /dev/null
+++ b/src/Html5/Tags/ScriptTag.php
@@ -0,0 +1,156 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\MetadataContent;
+use ByJoby\HTML\ContentCategories\PhrasingContent;
+use ByJoby\HTML\DisplayTypes\DisplayNone;
+use ByJoby\HTML\Tags\AbstractContentTag;
+
+class ScriptTag extends AbstractContentTag implements MetadataContent, PhrasingContent, DisplayNone
+{
+    const TAG = 'noscript';
+
+    public function setAsync(bool $async): static
+    {
+        if ($async) $this->attributes()['async'] = null;
+        else unset($this->attributes()['async']);
+        return $this;
+    }
+
+    public function async(): bool
+    {
+        return isset($this->attributes()['async']);
+    }
+
+    public function setDefer(bool $defer): static
+    {
+        if ($defer) $this->attributes()['defer'] = null;
+        else unset($this->attributes()['defer']);
+        return $this;
+    }
+
+    public function defer(): bool
+    {
+        return isset($this->attributes()['defer']);
+    }
+
+    public function crossorigin(): null|string
+    {
+        return $this->attributes()['crossorigin'];
+    }
+
+    public function setCrossorigin(null|string $crossorigin): static
+    {
+        $this->attributes()['crossorigin'] = $crossorigin;
+        return $this;
+    }
+
+    public function unsetCrossorigin(): static
+    {
+        unset($this->attributes()['crossorigin']);
+        return $this;
+    }
+
+    public function integrity(): null|string
+    {
+        return $this->attributes()['integrity'];
+    }
+
+    public function setIntegrity(null|string $integrity): static
+    {
+        $this->attributes()['integrity'] = $integrity;
+        return $this;
+    }
+
+    public function unsetIntegrity(): static
+    {
+        unset($this->attributes()['integrity']);
+        return $this;
+    }
+
+    public function nomodule(): null|string
+    {
+        return $this->attributes()['nomodule'];
+    }
+
+    public function setNomodule(null|string $nomodule): static
+    {
+        $this->attributes()['nomodule'] = $nomodule;
+        return $this;
+    }
+
+    public function unsetNomodule(): static
+    {
+        unset($this->attributes()['nomodule']);
+        return $this;
+    }
+
+    public function nonce(): null|string
+    {
+        return $this->attributes()['nonce'];
+    }
+
+    public function setNonce(null|string $nonce): static
+    {
+        $this->attributes()['nonce'] = $nonce;
+        return $this;
+    }
+
+    public function unsetNonce(): static
+    {
+        unset($this->attributes()['nonce']);
+        return $this;
+    }
+
+    public function referrerpolicy(): null|string
+    {
+        return $this->attributes()['referrerpolicy'];
+    }
+
+    public function setReferrerpolicy(null|string $referrerpolicy): static
+    {
+        $this->attributes()['referrerpolicy'] = $referrerpolicy;
+        return $this;
+    }
+
+    public function unsetReferrerpolicy(): static
+    {
+        unset($this->attributes()['referrerpolicy']);
+        return $this;
+    }
+
+    public function src(): null|string
+    {
+        return $this->attributes()['src'];
+    }
+
+    public function setSrc(null|string $src): static
+    {
+        $this->attributes()['src'] = $src;
+        return $this;
+    }
+
+    public function unsetSrc(): static
+    {
+        unset($this->attributes()['src']);
+        return $this;
+    }
+
+    public function type(): null|string
+    {
+        return $this->attributes()['type'];
+    }
+
+    public function setType(null|string $type): static
+    {
+        $this->attributes()['type'] = $type;
+        return $this;
+    }
+
+    public function unsetType(): static
+    {
+        unset($this->attributes()['type']);
+        return $this;
+    }
+}
diff --git a/src/Html5/Tags/SectionTag.php b/src/Html5/Tags/SectionTag.php
new file mode 100644
index 0000000..f8add90
--- /dev/null
+++ b/src/Html5/Tags/SectionTag.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace ByJoby\HTML\Html5\Tags;
+
+use ByJoby\HTML\ContentCategories\SectioningContent;
+use ByJoby\HTML\DisplayTypes\DisplayBlock;
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+class SectionTag extends AbstractContainerTag implements DisplayBlock, SectioningContent
+{
+    const TAG = 'section';
+}
diff --git a/src/Html5/Tags/StyleTag.php b/src/Html5/Tags/StyleTag.php
index c79f801..511bbf8 100644
--- a/src/Html5/Tags/StyleTag.php
+++ b/src/Html5/Tags/StyleTag.php
@@ -2,9 +2,10 @@
 
 namespace ByJoby\HTML\Html5\Tags;
 
+use ByJoby\HTML\ContentCategories\MetadataContent;
 use ByJoby\HTML\Tags\AbstractContentTag;
 
-class StyleTag extends AbstractContentTag
+class StyleTag extends AbstractContentTag implements MetadataContent
 {
     const TAG = 'style';