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92b3f0e817
- Updated progress with some more impl-no decisions - Loose vs. Strict now has better tallying on current behavior - Document what we're not allowing in loose - Strict boolean indicator added to HTMLDefinition - Added XHTML 1.1 to TODO. git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@571 48356398-32a2-884e-a903-53898d9a118a
37 lines
1.7 KiB
Plaintext
37 lines
1.7 KiB
Plaintext
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Is HTML Purifier Strict or Transitional?
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A little bit of helpful guidance
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Despite the fact that HTML Purifier professes only to support transitional
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HTML, it rejects a lot of attributes and elements that are actually, indeed,
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valid. You can investigate progress.html to find out precisely what we
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are doing to these *deprecated* attributes.
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However, users have found that Strict HTML imposes some quite unreasonable
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restrictions on certain things. The start and value attributes in ol and
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li (respectively) perhaps are the most contested. There's is currently no
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widely supported browser method short of JavaScript that can replace these
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two deprecated elements. HTML Purifier does not currently support them, but
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it might behoove us to do so while our output is still transitional.
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Fortunantely, that's the only real bugger case. The others have near-perfect
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CSS equivalents, and were presentational anyway. However, the other question
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pops up: should we always convert these to the CSS forms when 1. the spec
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allows them anyway and 2. older browsers support them better? After all, the
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whole point about CSS is to seperate styling from content, so inline styling
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doesn't solve that problem.
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It's an icky question, and we'll have to deal with it as more and more
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transforms get implemented. As of right now, however, we currently support
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these loose-only constructs in loose mode:
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- <ul start="1">, <li value="1"> attributes
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- <u>, <strike>, <s> tags
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- flow children in <blockquote>
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- mixed children in <address>
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The changed child definitions as well as the ul.start li.value are the most
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compelling reasons why loose should be used. We may want offer disabling <u>,
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<strike> and <s> by themselves.
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