XQuery/The Emp-Dept case study

The Employee-Department case study used in the comparison of ../XQuery from SQL/ is used here to explore the XQuery/SPARQL pairing. Conversion to RDF Taking as the starting point the XML documents defining the three tables: Emp Dept Salgrade These documents are converted to RDF using an XQuery script guided by a mapping file. The generated RDF is cached. and accessed by an XQuery script to de-reference the resource URIs. Individual resource URIs are re-written in Apache to calls on an XQuery script which retrieves the fragment of RDF from the cached file. Thus; an employee a department The full RDF (need to change the rewrite rule to fix this strange uri) This should be replaced by a query on the SPARQL endpoint. RDF browsing This RDF can be browsed with and RDF browser such as Disco , OpenLink RDF browser OpenLink Data Explorer or Tabulator as an add-in to Opera or Firefox Querying with SPARQL The RDF can be queried with SPARQL. The same queries uses in the SQL /XQuery example are expressed in SPARQL in this tutorial