I'm trying a few things out and I'm puzzled by following behaviour.
I have
1 class :City with two subclasses :Actual_City, Historic_City.
On :City i have two spin rules
# Infer actual city
CONSTRUCT {
?city a :Actual_City .
}
WHERE {
?city a :City .
?city dct:temporal ?Period .
OPTIONAL {
?Period :endDate ?enddate .
} .
FILTER (!bound(?enddate)) .
}
and a similar one for infering a :Historic_City
(Trying to 'templatize' those is left for another exercise.)
Now running the spin inference and the city instances show up in the
correct subclass.
Now on the subclasses I add some spin constraints.
e.g. on :Actual_City
ASK WHERE {
?city dct:temporal ?period .
?period :endDate ?enddate .
}
This constraint doesn't work.
I need to add the line
?city a :Actual_City .
ASK WHERE {
?city a :Actual_City .
?city dct:temporal ?period .
?period :endDate ?enddate .
}
to get it up,
which seems a little bit odd since one is working in a OO oriented
way
and the constraint is set on the class itself.
I suppose the previous inference done, which has not been persisted,
is not taken into account.
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