#1 devel: XML: use xml/schema instead of DTD

[Daniel Franke]

Move from old style DTD to XML/Schema

Advantage: XML/Schema includes type and range checking.

Issue: XML/Schema not fully support by lbxml (<= 2.4)
TODO: check with latest version (2.6.8 as by 2004/04/14)

[Daniel Franke]

Logged In: YES
user_id=952821

libxml-2.6.9 (2004/04/18):
Unimplemented block at xmlschemas.c:2265

--xsd-snipplet--
<xsd:key name="locusref">
<xsd:selector xpath="genome/chromosome/locus" />
<xsd:field xpath="id" />
</xsd:key>
--