On 12/06/14 01:40, Cindy A McMullen wrote:
Thanks, Andy. We're trying to:
1. convert xsd:dateTime to timeInMsec
You'll need to add a custom function - you don't need to recompile
ARQ,it already supports dynmica loading of custom functions.
2. do some simple multiplication/division
Surely multiplication and division only make sense on intervals of time
(durations or, if you squint a bit, xsd:time).
The effects of multiplication and division on dates/dateTimes will
depend on the choice of the epoch point.
Andy
On Jun 11, 2014, at 12:04 PM, Andy Seaborne wrote:
On 11/06/14 17:44, Cindy A McMullen wrote:
Hi -
In a SPARQL query, is there a way to convert xsd:dateTime to 'time in
milliseconds' so that arithmetic operations are supported? Or must
we store the information as long (time in millisecs) to begin with?
Operations on xsd:dateTime are supported directly including durations (where it makes sense -
see "XQuery 1.0 and XPath 2.0 Functions and Operators" (F&O) for details - only
some durations are meaningful).
There is no conversion function provided to/from milliseconds (theer isn't in
F&O) but you can add one as a custom function.
What are you trying to do?
Andy
Thanks -
-- Cindy
