Re: [CODE4LIB] Expressing negatives and similar in RDF

2013-09-14 Thread Esmé Cowles
It's too bad rdf:nil is only for lists -- I think it could be handy in many other contexts. But just using an empty string should be fine: _:bn1 . _:bn1 . _:bn1 "UTF-8" . _:bn1 "" . I'm not sure I got much from that "Problems of the RDF model" piece, other than the fact that literals ar

Re: [CODE4LIB] Expressing negatives and similar in RDF

2013-09-14 Thread Karen Coyle
This mentions empty strings but doesn't give an example of one: *Lexical Space.* An rdf:PlainLiteral lexical form is a string of the form "/abc/@/langTag/" where "/abc/" is an arbitrary (possibly empty) string, and "/langTag/" is either the empty string or a (not necessarily lowercase) languag

Re: [CODE4LIB] Expressing negatives and similar in RDF

2013-09-14 Thread Esmé Cowles
Yes, I was thinking you would create a content as text node, and just leave the value blank (or maybe use something like rdf:nil). And the good thing about qnames is that you can use whatever you want. I always use "mads:" instead of "madsrdf:" for MADS, and would use "cat:" or "content:" for

Re: [CODE4LIB] Expressing negatives and similar in RDF

2013-09-14 Thread Karen Coyle
Hmm. For the missing title would you create a content as text node with a blank body? How does RDF handle empty strings?! (And I'm sorry to say that the qname for content as text is "cnt" - I'm going to have to just get over the dis-ease that causes me ) kc On 9/14/13 6:47 AM, Esmé Cowles wr

Re: [CODE4LIB] Expressing negatives and similar in RDF

2013-09-14 Thread Karen Coyle
This reminds me of a conversation (that did not come to a conclusion) on the BIBFRAME list about the need to have a way to say that a bit of data is transcribed, not transcribed, or supplied. And that reminds me of the issues with SKOS labels, which is that if your data is text, not a URI, you