|  Download Plan: Expand Main PHP Class to Cover All Possible HTML ElementsObjectiveExpand the PHP HTML builder to:
- Include a dedicated class for every HTML5 and deprecated HTML element (maximum coverage).
- Provide static factory methods in the main class (HtmlElement) for each element. 1. Inventory and Gap Analysis
Current Coverage: 66 element classes found in `src/` (see appendix for list).
Required Coverage: All HTML5 elements + all deprecated elements (see MDN HTML element reference).
Action: Compare the current list to the canonical list and identify missing elements.
 2. Class Generation3. Static Factory Methods4. Maintainability
Maintain a master list of elements (e.g., in a JSON or PHP array) to automate class and method generation.
Document the process for adding new elements in the future.
 5. Documentation
Update the README to explain:
- How to use the static factory methods.
- How to extend with new elements.
- The project's coverage philosophy (all HTML5 + deprecated).
 6. Example Mermaid DiagramclassDiagram
    class HtmlElement {
        +static div()
        +static marquee()
        +static p()
        %% ... one for each element ...
    }
    class Div
    class Marquee
    class P
    %% ... more element classes ...
    HtmlElement <|-- Div
    HtmlElement <|-- Marquee
    HtmlElement <|-- P
    %% ... more inheritance ...
 7. Implementation Steps
List all HTML5 and deprecated elements.
Identify missing classes.
Generate missing class files.
Add static factory methods to HtmlElement.
Test instantiation and HTML output for all elements.
Update documentation.
 Appendix: Current Element Classes
Address
Button
Bdi
Output
I
DataList
Input
Dfn
Details
Mark
Dt
Data
Em
Del
Ins
Dd
Option
Fieldset
Param
Iframe
Blockquote
Base
Form
Code
Meter
Dl
Abbr
Head
Figure
Cite
H
Audio
Li
Embed
HtmlPicture
Article
A
P
Link
Map
Meta
Object
Nav
Img
Header
Kbd
Canvas
Ol
Col
Bdo
Colgroup
Figcaption
Aside
Br
Dialog
HrElement
Label
Optgroup
Area
Div
Legend
Caption
Noscript
Footer
Main
Body
 Notes
Deprecated elements (e.g., `<marquee>`, `<font>`, `<center>`, etc.) should be included for completeness.
Custom elements (web components) are not included unless requested.
For elements with special attributes or content, tailor the constructor as needed.
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