- From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
- Date: 05 Nov 2002 14:40:01 +0000
- To: "Francis Brouns" <francis.brouns@ou.nl>
- Cc: <xmlschema-dev@w3.org>
ht@cogsci.ed.ac.uk (Henry S. Thompson) writes:
> I've just implemented it, and it's happy with your schema and the
> obvious instance. Will release later today/tomorrow.
Now released, to CVS, in online webform version and downloadable exe.
This reduces to four the number of unimplemented aspects of the
Structures part of W3C XML Schema in XSV:
1) All groups aren't properly checked or enforced;
2) ID/IDREF isn't checked;
3) Identity constraints are compared as strings, not values;
4) All numeric exponents >100 are treated as 100.
The first two are straight-forward but tedious -- SMOP.
The third is hard, as it requires implementing lexical->value space
conversion which is not always obvious.
The fourth will never happen, it makes denial of service attacks too
easy.
From Datatypes, a lot of simple type enforcement is still missing, and
will probably stay that way. . .
There will soon be an erratum moving responsibility for enforcing
ENTITY and ENTITIES to Structures, at which point the above count will
rise to five :-(
ht
--
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
W3C Fellow 1999--2002, part-time member of W3C Team
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
Received on Tuesday, 5 November 2002 09:40:04 UTC