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- From: Michael Anderson <michael@research.canon.com.au>
- To: xml <xml-dev@xml.org>
- Date: Wed, 10 May 2000 11:01:32 +1000
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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