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This page summarises the ''problems'' discussed in the e-mails that ended up in the [http://www.whatwg.org/issues/#html-parsing-rules-namespaces-discussion html-parsing-rules-namespaces-discussion] folder.
This page summarises the ''problems'' discussed in the e-mails that ended up in the [http://www.whatwg.org/issues/#html-parsing-rules-namespaces-discussion html-parsing-rules-namespaces-discussion] folder.


* '''Writing applications that contain graphics that represent custom data, while including that data for script manipulation.'''<br>Solution: <code>data-<var>foo</var>=""</code> on any element; <code>element.dataset[<var>foo</var>]</code> for DOM access. ([[CustomData|Other ideas...]])<br>Priorities:
* '''Writing applications that contain graphics that represent custom data, while including that data for script manipulation.'''<br>Proposal: <code>data-<var>foo</var>=""</code> on any element; <code>element.dataset[<var>foo</var>]</code> for DOM access. ([[CustomData|Other ideas...]])<br>Priorities:
** Embedding custom non-visible data in an HTML document for scripting purposes ✓‬
** Embedding custom non-visible data in an HTML document for scripting purposes ✓‬
** Forward compatible (so that future extensions don't introduce name clashes) ✓‬
** Forward compatible (so that future extensions don't introduce name clashes) ✓‬
** Ability to avoid ID clashes in multiple-document transclusion
** Ability to avoid ID clashes in multiple-document transclusion


* '''Ability for an author to unilaterally extend the language to address problems we are currently unaware of and that therefore are not covered by existing functionality.'''<br>Solution: <code>div</code> and <code>span</code> elements, <code>class</code> and <code>data-<var>foo</var>=""</code> on any element, along with JS, CSS, and, eventually, XBL2 ([[Extensions|Other ideas...]])<br>Priorities:
* '''Ability for an author to unilaterally extend the language to address problems we are currently unaware of and that therefore are not covered by existing functionality.'''<br>Proposal: <code>div</code> and <code>span</code> elements, <code>class</code> and <code>data-<var>foo</var>=""</code> on any element, along with JS, CSS, and, eventually, XBL2 ([[Extensions|Other ideas...]])<br>Priorities:
** Without trampling on the toes of others ✓‬
** Without trampling on the toes of others ✓‬
** Without being beholden to an external entity to provide the enhancements for the author on a timescale that is useful to the author ✓‬
** Without being beholden to an external entity to provide the enhancements for the author on a timescale that is useful to the author ✓‬


* '''Putting an equation in a Web page.'''<br>Priorities:
* '''Putting an equation in a Web page.'''<br>Proposal: allow MathML in text/html by hard-coding a bunch of MathML element tag names in the parser ([[Equations in HTML|Other ideas...]])<br>Priorities:
** Maintainability
** Maintainability
** Searchability
** Searchability
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** Resistance to errors (e.g. not brittle in the face of syntax errors)
** Resistance to errors (e.g. not brittle in the face of syntax errors)


* '''Migrating from LaTeX to HTML.'''<br>Priorities:
* '''Migrating from LaTeX to HTML.'''<br>Proposal: a tool? ([[LaTeX to HTML|Other ideas...]])<br>Priorities:
** Fidelity
** Fidelity


* '''Writing a document by hand, with inline diagrams imported from a graphics package.'''<br>Priorities:
* '''Writing a document by hand, with inline diagrams imported from a graphics package.'''<br>Proposal: allow SVG in text/html by hard-coding a bunch of SVG element tag names and attributes in the parser ([[Diagrams in HTML|Other ideas...]])<br>Priorities:
** Compatibility with existing graphics packages
** Compatibility with existing graphics packages
** Scriptable (retained-mode, with DOM support, without requiring cross-frame scripting)
** Scriptable (retained-mode, with DOM support, without requiring cross-frame scripting)
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** Resistance to errors (e.g. not brittle in the face of syntax errors)
** Resistance to errors (e.g. not brittle in the face of syntax errors)


* '''Writing a document by hand, with vector graphic icons.'''<br>Priorities:
* '''Writing a document by hand, with vector graphic icons.'''<br>Proposal: <code>img</code> elements with external SVG ([[Vector Icons|Other ideas...]])<br>Priorities:
** Maintainability
** Maintainability
** Good caching behaviour
** Good caching behaviour


* '''Mixing vector graphics, mathematics, and other features.'''<br>Priorities:
* '''Mixing vector graphics, mathematics, and other features.'''<br>Proposal: MathML, SVG, and HTML ([[Mixed namespaces|Other ideas...]])<br>Priorities:
** Diagrams that include typographically-correct mathematics
** Diagrams that include typographically-correct mathematics
** Formulae that include vector graphics
** Formulae that include vector graphics
** Formulae and diagrams that contain form controls
** Formulae and diagrams that contain form controls


* '''Animating Web page content (hypertext, vector graphics).'''<br>Priorities:
* '''Animating Web page content (hypertext, vector graphics).'''<br>Proposal: Use the CSS animation proposal ([[Animation in HTML|Other ideas...]])<br>Priorities:
** Set or animate sizes, positions, opacities, colors, transforms (basically most attributes and properties)
** Set or animate sizes, positions, opacities, colors, transforms (basically most attributes and properties)
** Time-based triggering, event-based triggering
** Time-based triggering, event-based triggering
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** Quality: animation should adapt to the frame rate capabilities of the device, not be forced to use a particular frame rate by a script
** Quality: animation should adapt to the frame rate capabilities of the device, not be forced to use a particular frame rate by a script


* '''Writing highly interactive, graphically intensive sites.'''<br>Priorities:
* '''Writing highly interactive, graphically intensive sites.'''<br>Proposal: ? ([[Interactive Sites|Other ideas...]])<br>Priorities:
** Searchability
** Searchability
** Accessibility
** Accessibility


* '''Including XBL2 inline in a text/html document the same way CSS and JS can be included inline.'''<br>Priorities:
* '''Including XBL2 inline in a text/html document the same way CSS and JS can be included inline.'''<br>Proposal: ? ([[XBL2 in HTML|Other ideas...]])<br>Priorities:
** Expressiveness (anything expressed in XBL2 as text/xml should be possible in text/html)
** Expressiveness (anything expressed in XBL2 as text/xml should be possible in text/html)



Revision as of 23:05, 28 March 2008

This page summarises the problems discussed in the e-mails that ended up in the html-parsing-rules-namespaces-discussion folder.

  • Writing applications that contain graphics that represent custom data, while including that data for script manipulation.
    Proposal: data-foo="" on any element; element.dataset[foo] for DOM access. (Other ideas...)
    Priorities:
    • Embedding custom non-visible data in an HTML document for scripting purposes ✓‬
    • Forward compatible (so that future extensions don't introduce name clashes) ✓‬
    • Ability to avoid ID clashes in multiple-document transclusion
  • Ability for an author to unilaterally extend the language to address problems we are currently unaware of and that therefore are not covered by existing functionality.
    Proposal: div and span elements, class and data-foo="" on any element, along with JS, CSS, and, eventually, XBL2 (Other ideas...)
    Priorities:
    • Without trampling on the toes of others ✓‬
    • Without being beholden to an external entity to provide the enhancements for the author on a timescale that is useful to the author ✓‬
  • Putting an equation in a Web page.
    Proposal: allow MathML in text/html by hard-coding a bunch of MathML element tag names in the parser (Other ideas...)
    Priorities:
    • Maintainability
    • Searchability
    • Accessibility
    • Typographically-sound printing
    • Ease of authoring (are authors willing to learn new formats?)
    • Ease of import from existing documents
    • Ease of implementation (are UAs willing to implement new formats?)
    • Resistance to errors (e.g. not brittle in the face of syntax errors)
  • Migrating from LaTeX to HTML.
    Proposal: a tool? (Other ideas...)
    Priorities:
    • Fidelity
  • Writing a document by hand, with inline diagrams imported from a graphics package.
    Proposal: allow SVG in text/html by hard-coding a bunch of SVG element tag names and attributes in the parser (Other ideas...)
    Priorities:
    • Compatibility with existing graphics packages
    • Scriptable (retained-mode, with DOM support, without requiring cross-frame scripting)
    • Round-tripping (the ability to take image fragments from a Web page and edit them)
    • Ease of implementation (are UAs willing to implement new formats?)
    • Resistance to errors (e.g. not brittle in the face of syntax errors)
  • Writing a document by hand, with vector graphic icons.
    Proposal: img elements with external SVG (Other ideas...)
    Priorities:
    • Maintainability
    • Good caching behaviour
  • Mixing vector graphics, mathematics, and other features.
    Proposal: MathML, SVG, and HTML (Other ideas...)
    Priorities:
    • Diagrams that include typographically-correct mathematics
    • Formulae that include vector graphics
    • Formulae and diagrams that contain form controls
  • Animating Web page content (hypertext, vector graphics).
    Proposal: Use the CSS animation proposal (Other ideas...)
    Priorities:
    • Set or animate sizes, positions, opacities, colors, transforms (basically most attributes and properties)
    • Time-based triggering, event-based triggering
    • Inlined (for simple web pages) and non-inlined animations (to promote separation of content and presentation)
    • Linear and spline interpolation
    • Syndication: animation shouldn't use scripts that can't be trusted by syndicators
    • Quality: animation should adapt to the frame rate capabilities of the device, not be forced to use a particular frame rate by a script
  • Writing highly interactive, graphically intensive sites.
    Proposal: ? (Other ideas...)
    Priorities:
    • Searchability
    • Accessibility
  • Including XBL2 inline in a text/html document the same way CSS and JS can be included inline.
    Proposal: ? (Other ideas...)
    Priorities:
    • Expressiveness (anything expressed in XBL2 as text/xml should be possible in text/html)

Areas for research

  • What is the most widely known way of authoring mathematics?
  • What human-editable source language are equations mostly serialised in today?

Supporting data