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Subject: owl:inverseOf, owl:ObjectProperty, owl:DatatypeProperty
This might be useful to define the semantics of our $word http://www.w3.org/TR/owl-ref/#inverseOf-def in particular, one could assume that, in XDI, $inv<someproperty> is a shortcut for this: <owl:ObjectProperty rdf:about="$inv<someproperty>"> <owl:inverseOf rdf:resource="<someproperty>"/> </owl:ObjectProperty> Likewise in OWL one can distinguish between owl:ObjectProperty and owl:DatatypeProperty, which is roughly the same as not having or having ! at the end of an XDI predicate, i.e. the range of the predicate is an object or a datatype: <owl:ObjectProperty rdf:ID="+age"/> <owl:DatatypeProperty rdf:ID="+age!"/> So XDI should be more OWL (DL) oriented than "pure" RDF oriented... Giovanni > 4) MOVING FROM METAGRAPH SYMBOLS TO METAGRAPH WORDS > > See Drummond's email to the list and subsequent discussion: > > http://lists.oasis-open.org/archives/xdi/201106/msg00029.html > > Drummond summarized last week's discussion, and said that is really > becomes an aesthetic decision by the TC, since $ ==>$is, * ==> $has, > and ! ==> $a are functionality identical. > > Bill said that he is in favor of moving back to metagraph words for > these symbols, but feels we should have separate $words for > equivalence and inversion. > > Giovanni pointed out that even though RDF does not have an > algorithmic way to express inversion, Linked Data does suggest that > nodes that are linked also include the inverse link so that you can > discover the relationship in both directions. > > Note that by itself, adopting a separate $word for inversion is not > a solution to the RDF incompability issue. > > # ALL - Send your stack-ranked choice for a new $word for asserting > inversion as an email to the list before next week's call. > ---------------------------------------------------------------- Invito da parte dell'Ateneo: Il tuo futuro e quello della Ricerca Scientifica hanno bisogno del tuo aiuto. Dona il 5 x mille all'Universita' di Roma Tor Vergata codice fiscale: 80213750583 http://5x1000.uniroma2.it
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