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New Vocabularies

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Revision as of 02:45, 3 April 2008 by Hixie (talk | contribs)
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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...)
    • 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...)
    • 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 the 34 Presentational MathML 2.0 elements to be used in text/html by hard-coding those tag names in the parser, with end tags made optional where possible (Other ideas...)
    • Maintainability ✓ (Somewhat: MathML is pretty verbose, but omitting end tags helps a lot; disallowing Content MathML helps too.)
    • Searchability ✓ (Somewhat: more complex maths might be better handled if Content MathML was available.)
    • Accessibility ✓
    • Typographically-sound printing ✓
    • Ease of authoring (are authors willing to learn new formats?) ✓ (Ok for MathML authors; not for LaTeX authors.)
    • Ease of import from existing documents ✓ (Ok for MathML source documents, not for LaTeX source documents.)
    • Ease of implementation (are UAs willing to implement new formats?) (Ok for Mozilla, but not for other vendors.)
    • Resistance to errors (e.g. not brittle in the face of syntax errors) ✓
    • Numbering the equation ✓ (Using, e.g. the title attribute and CSS.)
  • 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...)
    • 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...)
    • Maintainability ✓
    • Good caching behaviour ✓
  • Mixing vector graphics, mathematics, and other features.
    Proposal: MathML, SVG, and HTML (Other ideas...)
    • 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...)
    • 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...)
    • Searchability
    • Accessibility

Rejected requirements

  • Migrating from LaTeX to HTML.
    Proposal: a tool? (Other ideas...)
    • Fidelity ✓ (Depends mostly on the tool, assuming CSS, SVG, and MathML support everything LaTeX does.)
  • Including XBL2 inline in a text/html document the same way CSS and JS can be included inline.
    Proposal: ? (Other ideas...)
    • 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