Forwarded message 1
Hello,
Is it possible to define a new simple type to constrain the pattern of a
time duration so that duration can at most be measured in days. For
instance,
<xsd:simpleType name="MyTimeDuration"
base="xsd:timeDuration">
<xsd:pattern
value="-?P(\d+D)?(T(\d+H)?(\d+M)?(\d+(\.\d+)?S)?)?" />
</xsd:simpleType>
According to the XML Schema working drafts, pattern facet is allowed for
timeDuration. My interpretation is that any pattern facet, once
specified for a subtype of the timeDuration type, can further restrict
the format of timeDuration provided that it is still of a valid
timeDuration format. Is
this correct? Furthermore does the parser need to check this? ie check
that the pattern of MyTimeDuration is indeed still a valid pattern for
timeDuration.
Cheers,
Michael.
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Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
W3C Fellow 1999--2001, 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/