Re: Modeling the author's position from research papers into RDF graph

Dear Michael,

> am I missing something or is there no way to close an empty list with the
> Collections Ontology ? That would be bad.

It is of course possible to make empty list using CO, since neither co:firstItem nor co:lastItem are mandatory for the class co:List – i.e. co:List is restricted to be a subclass of 
	co:lastItem max 1 and co:firstItem max 1

Thus, you can define empty list as follows:

:my-list a co:List ;
	co:size "0"xsd:nonNegativeInteger .

I hope it might help.

Have a nice day :-)

S.




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Silvio Peroni, Ph.D.
Department of Computer Science and Engineering
University of Bologna, Bologna (Italy)
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