half-baked parsers vs binary XML

John Cowan cowan at locke.ccil.org
Sun Mar 28 07:10:57 BST 1999

David Megginson scripsit:

> At least when I was maintaining it, AElfred didn't perform all of the
> required well-formedness checks for different ranges of Unicode
> characters allowed and not allowed in names, attribute values,
> character data, etc.  I tried adding it, but it bloated the code by
> about 7-8K (much more than parsing the prolog and DTD).

According to the corrigenda, attribute values and character data
can now contain anything except (hex) 0000-0008, 000B-000C, 000E-001F,
(ASCII controls), D800-DFFF (surrogates), and FFFE-FFFF (non-characters).
Everything else should be allowed.

There are some rules in Appendix B of XML that allow you to leverage
the methods in Character.  When I get a chance, i"ll write some Java
code that correctly recognizes XML name and name-start characters.
The big tables are already in the java.lang.Character class.

John Cowan					cowan at ccil.org
		e'osai ko sarji la lojban.

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