Subject: RE: [xsl] dateTime fun From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Thu, 21 Dec 2006 18:46:21 -0000 |
> So I'm dealing with a schema which has an attribute: > > <xs:simpleType name="time"> > <xs:union memberTypes=" > xs:gYear xs:gYearMonth xs:date xs:dateTime" /> > </xs:simpleType> > > I had to write a function to let someone compare two of these 'time' > simple types. It appeared as though the only way to do > comparisions was with equal times, so that mean converting > everything to xs:dateTime. For better or worse, the gXX types are very poorly supported by standard functions and operators. I think the reason for this is that a lot of people on the WGs felt that (a) these types were of very specialized interest compared with other primitive types, and (b) date/time handling already had far too big a share of the function library even without adding these to the mix. It's also true that union types aren't all that well supported in the type system. You can declare a function that takes as="element(*,time)" or as="attribute(*,time)" as an argument, but you can't say as="time" because it's not an atomic type. So I think I would probably end up with something fairly similar to your solution. Michael Kay http://www.saxonica.com/
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