Hi Miroslav,
yes we do have a built-in magic property for that purpose. See TBC Help
TopBraid Composer > Reference > TopBraid's SPARQL Property Functions
scroll to tops:constructRDFList
HTH
Holger
On 11/19/2015 20:48, Miroslav Blasko wrote:
Hi,
i would like to create OWL2 axioms with SPARQL construct query that is
using rdf collections. I will demonstrate the idea on an example.
Lets imagine that i have an ontology of Fruit and Vegetable shops with
following OWL classes :
Shop
FruitShop
VegetableShop
Food
Fruit
Apple
Pear
Banana
Vegetable
Carrot
Cabbage
By querying the ontology I would like to create axiom that state what
types of fruits is fruit shop selling (and possibly what type of
vegetables can be vegetable-shop selling) i.e. i would like to say :
:FruitShop
rdf:type owl:Class ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:allValuesFrom [
rdf:type owl:Class ;
owl:unionOf (
:Pear
:Apple
:Banana
) ;
] ;
owl:onProperty :hasFruit ;
] ;
Would it be somehow possible to construct such OWL axiom using some
"SPIN" func/template/magic properties ? I am thinking of something
like this :
CONSTRUCT {
?shop rdf:type owl:Class .
?shop rdfs:subClassOf _:restriction .
_:restriction rdf:type owl:Restriction .
_:restriction owl:allValuesFrom _:union .
_:union rdf:type owl:Class .
_:union owl:unionOf *?coll_head* .
*?coll_subj ?coll_pred ?coll_obj .*
_:restriction owl:onProperty :hasFruit .
} WHERE {
?shop rdfs:subClassOf :Shop .
?food rdfs:subClassOf :Food .
(FILTER ?shop = :FruitShop)
(FILTER ?food = :Fruit)
?specificFood rdfs:subClassOf ?food .
*(?shop ?specificFood) :collectionConstructorMagicProperty (?coll_head
?coll_subj ?coll_pred ?coll_obj) . *
}
Note that my goal is not to create this specific query, but to create
some helper vocabulary based on SPIN, that would help me construct
tqueries that needs to construct such dynamic rdf collection (e.g. for
making OWL axiom closures etc..)
Thank you,
Cheers,
Miroslav
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