Semantic Web for the Working Ontologist, 2nd Edition

Assignments (SPARQL 1.1)

Suppose we want to query the full names of the authors of the book “Semantic Web for the Working Ontologist.” We can easily find first names and last names, but how do we get the full names? It is a simple enough computation—concatenate the first and last names together, with an embedded space. But the string “James Hendler” is nowhere to be found in the data set. How do we create it?

Tell-and-ask systems typically answer questions based on information that was told to them—this is true for spreadsheets, notebooks, databases, and RDF stores. But many tell-and-ask systems go beyond this, and provide ways for you to specify information that you didn’t (directly) tell the system. We have already seen how this can be done ...