FYI, this paper and talk from Jim Melton of Oracle may be of interest: http://xtech06.usefulinc.com/schedule/paper/119 http://www.w3.org/2006/Talks/0301-melton-query-langs.pdf In the paper he mentions: [[ SPARQL syntax makes virtually all join operations implicit, while SQL syntax usually makes them explicit. A consequence of this design decision is that the SQL expressions to answer typical questions that will be asked against RDF collections tend to be much larger and somewhat more difficult to create (correctly!) because of the need to write explicit join operations and the requisite explicit join conditions. Because typical questions asked of RDF involve several, sometimes many, join operations, SPARQL provides a more compact notation that is perhaps easier to get right with less debugging time spent. ]]
David Booth, Ph.D. HP Software +1 617 629 8881 office | [EMAIL PROTECTED] http://www.hp.com/go/software Opinions expressed herein are those of the author and do not represent the official views of HP unless explicitly stated otherwise.
