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- From: "Eve L. Maler" <elm@arbortext.com>
- To: "XML-Dev Mailing list" <xml-dev@ic.ac.uk>
- Date: Fri, 15 Oct 1999 06:47:47 -0400
At 03:17 PM 10/15/99 +0800, Rick Jelliffe wrote:
> Element PI Attribute
>----------------- -------- ------ ---------
>Push/pull Push Push Pull
>effect/structure structure effect structure
This is a very useful matrix; it explains neatly something I've been trying
to articulate about XML processing. It's pretty harmless to add attributes
to a document, because "by default" they don't get used in the output
stream, but for formatting, elements must all be "consumed" somewhere by
default. For data-oriented processing, everything seems to be pull, though.
By the way, the main reason why we changed the closing delimiter of SGML
PIs from > to ?> in creating XML was to make PIs safer for containing
scripting and code. It's pretty common to have the string ">" appear in
scripting, but (we hoped) far less common to have "?>". Besides, it made
it more symmetrical...
Eve
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