Hi,
It might be because the sp:now() is in a IF that its not being picked up
by arq for being made a constant in the query engine. So the following
might work.
Regards,
Jerven (Not associated with topquadrant in any way)
CONSTRUCT {
?EW ns:WEInitiation ?EWI .
?EW ns:WEHasDateTime ?EWDT .
}
WHERE {
BIND(now() as ?now)
?this ns:FRHasWEThresholdLevel ?EWTL .
?this ns:FRHasWEScoreLevel ?EWSL .
?this ns:FRInitiatesWE ?EW .
BIND (IF((?EWSL >= ?EWTL), true, false) AS ?EWI) .
BIND (IF((?EWSL >= ?EWTL), ?now, "") AS ?EWDT) .
}
On 29/09/14 15:53, K. J. Toad wrote:
While developing some SPIN rules, I have encountered a problem, I don't
know how to solve. I'm very new to ontologies, SPARQL and SPIN and my
last thread was answered very quickly and I'm so thankful for that. So
I'll try it again with this problem.
I have the following code that should set a DateTime as soon as a
threshold is reached or surpassed. However, I encounter an infinite loop
when using sp:now(). I have tried it with different methods, including
just setting a 'date' manually (e.g. 2/2/2014), which works just fine.
*CONSTRUCT*{
?EW ns:WEInitiation ?EWI .
?EW ns:WEHasDateTime ?EWDT .
}
*WHERE*{
*?this* ns:FRHasWEThresholdLevel ?EWTL .
*?this* ns:FRHasWEScoreLevel ?EWSL .
*?this* ns:FRInitiatesWE ?EW .
*BIND* (*IF*((?EWSL >= ?EWTL), true, false) *AS* ?EWI) .
*BIND* (*IF*((?EWSL >= ?EWTL), sp:now(), "") *AS* ?EWDT)
.<https://groups.google.com/forum/#_msocom_1>
Can you please help me figure out what the problem is? Is it the
mechanics of SPIN rules that won't work here? I assumed that the problem
was, that sp:now takes the time as it is now, and again, and again,
since 'now' is relative. But after reading the description it says that
'now' is when the query was started.
Thanks in advance.
K. J.
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