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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Hi <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>I
have a question to do with rdql.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>I
have an rdf file containing records of the following format:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><rdfs:Class
rdf:about="&Content;City"<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> rdfs:label="Content:City"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> <rdfs:comment>Documentation
on City(SUMO): A LandArea of relatively small size, inhabited by a community
of people, and having some sort of political structure. Note that this class
includes both large cities and small settlements like towns, villages, hamlets,
etc.</rdfs:comment><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> <rdfs:subClassOf
rdf:resource="&Content;GeopoliticalArea"/><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'></rdfs:Class><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>At
the moment I have query which gets the label and the comment attribute values without
any problem.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>How
can I modify the query so that it retrieves the value of the resource subclass.<br>
Some classes in the rdf file have more than one subclass and I need to be able
to retrieve the set of subclasses with my query.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>My
query as it stands is:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>const
char *query_string="select ?label, ?comment from
<file:/export/CISR-D/jagdev/okapi/progs/news.rdf> where (?x rdf:type
rdfs:Class) (?x,rdfs:label, ?label), (?x, rdfs:comment, ?comment) using rdf
for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>, rdfs for
<http://www.w3.org/2000/01/rdf-schema#>"; <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Any
help/pointers would be gratefully appreciated.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Jagdev</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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