Hi Daniel,
you have found a bug in Jena, which will be fixed in the next ARQ release and
folded into TopBraid when available:
http://tech.groups.yahoo.com/group/jena-dev/message/46124
Meanwhile, you could use the function smf:cast(?literal, xsd:time).
Cheers
Holger
On Dec 3, 2010, at 6:23 AM, Daniel Mekonnen wrote:
> Greetings,
>
> I was surprised to discover that an xsd:time casting function was not
> available to SPARQL expressions with TBC. I expect the limitation is
> with one of the underlying libraries. The expression:
>
> LET( ?time := xsd:time("12:34:56") ) .
>
> produces the warning:
>
> WARN [Thread-34] (ALog.java:48) - URI <http://www.w3.org/2001/
> XMLSchema#time> has no registered function factory
>
>
> Checking the SPARQL spec, I don't see xsd:time listed as a supported
> function. But then neither is xsd:date() which is supported through
> TBC. Is there a list of casting functions available? Why wouldn't they
> all be supported?
>
> One more note on xsd:time. I noticed when selecting a datatype range
> that xsd:time appears in the list, but is the only one to have a plain
> blue icon. Since a clock icon is in use by xsd:dateTime, I'd like to
> suggest a "T" or perhaps an hourglass. A last thought for the
> datatype icons, a background color of green, matching that of the
> datatype property icon, would give some mnemonic continuity.
>
> thanks!
>
> -Daniel
>
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