David, Antonino; The prefix syntax is correct as defined, i.e.
PREFIX bif: <http://www.openlinksw.com/schemas/bif#>
-- Scott
On 1/7/2015 2:06 PM, David Price wrote:
Only use angle brackets for full URIs, not when using prefixes.
Cheers,
David
UK +44 7788 561308
US +1 336 283 0606
Hi all,
I'm enjoying experimenting SPIN rules as
federated queries to Linked Data cloud and local
Virtuoso stored datasets. The queries I'm trying to
implement in SPIN are CONSTRUCT with bif: geospatial
functions usage.
I have tried this in TBC FE 4.6 but I get
a strange behaviour:
the rule I execute is working under TBC
Sparql tab (even if raising "- URI
<bif:st_point> has no registered function
factory" warnings) producing the expected inference
outcome. If I try to execute the same as a spin:rule
attached to a class with Run Inference I get no
results, also Im unable to add the row PREFIX bif: <http://www.openlinksw.com/schemas/bif#> to
the rule, this is being deleted after clicking enter.
Query is like:
CONSTRUCT {
?this owl:sameAs ?that .
}
WHERE {
?this foaf:name ?label1 .
?this geo:lat ?lat1 .
?this geo:long ?long1 .
} .
FILTER
<bif:st_intersects>(<bif:st_point>(xsd:float(?lat1),
xsd:float(?long1)),
<bif:st_point>(xsd:float(?lat2),
xsd:float(?long2)), 0.08) .
} .
}
Any suggestion?
Thanks
Antonino Lo Bue
CNR-ICAR Palermo
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