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Part II: OWL - Foundations of Semantic Web Technologies

Part II: OWL - Foundations of Semantic Web Technologies

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Understanding SROIQ(D)<br />

ALC + role chains = SR<br />

hasParent o hasBrother v hasUncle<br />

:hasUncle owl:propertyChainAxiom (:hasParent :hasBrother ) .<br />

∀x ∀y (∃z ((hasParent(x,z) ∧ hasBrother(z,y)) → hasUncle(x,y)))<br />

includes top property and bottom property<br />

includes S = ALC + transitivity<br />

hasAncestor o hasAncestor v hasAncestor<br />

includes SH = S + role hierarchies<br />

hasFather v hasParent<br />

I'll skip RDF syntax in the following.<br />

17

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