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It’s probably worth pointing out that DC elements is a (soon to be deprecated, I think) flavor of DC that’s not really set up for RDF. DC terms[1] has an ontology that explicitly defines the domain and range for many of the predicates and for creator[2], it defines the range as an Agent[3], not a string. In other words, you want a URI representing a typed Thing as an object for dc:creator. Best, Aaron Rubinstein [1] http://dublincore.org/documents/dcmi-terms/#H2 [2] http://dublincore.org/documents/dcmi-terms/#terms-creator [3] http://dublincore.org/documents/dcmi-terms/#terms-Agent On Nov 3, 2013, at 6:05 AM, Esmé Cowles <[log in to unmask]> wrote: > Eric- > > I think dc:creator is supposed to take a string instead of an object or URI. So I think you should use a different predicate, which takes a class as an object. Then you can have an object that describes Thomas Jefferson and include both his name and gender, links to authority records, etc.: > > <rdf:RDF > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" > xmlns:dc="http://purl.org/dc/elements/1.1/" > xmlns:foaf="http://xmlns.com/foaf/0.1/" > xmlns:owl="http://www.w3.org/2002/07/owl#" > xmlns:foo="http://foo.org/"> > > <!-- the Declaration Of Independence was authored by Thomas Jefferson, who is male --> > <rdf:Description > rdf:about="http://www.archives.gov/exhibits/charters/declaration_transcript.html"> > <dc:creator>Thomas Jefferson</dc:creator> > <foo:creator> > <foaf:Person rdf:about="http://www.worldcat.org/identities/lccn-n79-89957"> > <foaf:name>Thomas Jefferson</foaf:name> > <foaf:gender>male</foaf:gender> > <owl:sameAs rdf:resource="http://id.loc.gov/authorities/names/n79089957"/> > </foaf:Person> > </foo:creator> > </rdf:Description> > </rdf:RDF> > > -Esme > -- > Esme Cowles <[log in to unmask]> > > "Men feared witches and burnt women." > -- Louis Brandeis, Whitney v. California, concurring > > On 11/3/2013, at 12:00 AM, Eric Lease Morgan <[log in to unmask]> wrote: > >> >> How can I write an RDF serialization enabling me to express the fact that the United States Declaration Of Independence was written by Thomas Jefferson and Thomas Jefferson was a male? (And thus asserting that the Declaration of Independence was written by a male.) >> >> Suppose I have the following assertion: >> >> <rdf:RDF >> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" >> xmlns:dc="http://purl.org/dc/elements/1.1/" > >> >> <!-- the Declaration Of Independence was authored by Thomas Jefferson --> >> <rdf:Description >> rdf:about="http://www.archives.gov/exhibits/charters/declaration_transcript.html"> >> <dc:creator>http://www.worldcat.org/identities/lccn-n79-89957</dc:creator> >> </rdf:Description> >> >> </rdf:RDF> >> >> Suppose I have a second assertion: >> >> <rdf:RDF >> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" >> xmlns:foaf="http://xmlns.com/foaf/0.1/"> >> >> <!-- Thomas Jefferson was a male --> >> <rdf:Description rdf:about="http://www.worldcat.org/identities/lccn-n79-89957"> >> <foaf:gender>male</foaf:gender> >> </rdf:Description> >> >> </rdf:RDF> >> >> Now suppose a cool Linked Data robot came along and harvested my RDF/XML. Moreover lets assume the robot could make the logical conclusion that the Declaration was written by a male. How might the robot express this fact in RDF/XML? The following is my first attempt at such an expression, but the resulting graph (attached) doesn't seem to visually express what I really want: >> >> <rdf:RDF >> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#” >> xmlns:foaf="http://xmlns.com/foaf/0.1/“ >> xmlns:dc="http://purl.org/dc/elements/1.1/“> >> >> <rdf:Description rdf:about="http://www.worldcat.org/identities/lccn-n79-89957"> >> <foaf:gender>male</foaf:gender> >> </rdf:Description> >> >> <rdf:Description >> rdf:about="http://www.archives.gov/exhibits/charters/declaration_transcript.html"> >> <dc:creator>http://www.worldcat.org/identities/lccn-n79-89957</dc:creator> >> </rdf:Description> >> </rdf:RDF> >> >> Am I doing something wrong? How might you encode such the following expression — The Declaration Of Independence was authored by Thomas Jefferson, and Thomas Jefferson was a male. And therefore, the Declaration Of Independence was authored by a male named Thomas Jefferson? Maybe RDF can not express this fact because it requires two predicates in a single expression, and this the expression would not be a triple but rather a “quadrile" — object, predicate #1, subject/object, predicate #2, and subject? >> >> >> — >> Eric Morgan >> >> [cid:[log in to unmask]] >> >>