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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Dear All<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>I
have not had a response from the help archive to my earlier messages, so I
guess from the sounds of things I can only use a literal value in the search
condition for a query to retrieve specific records<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>So it
is ok to do:<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=3 face=Arial><span style='font-size:12.0pt'>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) and ?label ==
‘Content:Agent’ 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'>but
not ok for the condition to have a variable in the comparison eg<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>….
and ?label==Keyword[i] …..<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'><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'>To overcome
this, the only other solution I can think of is to convert value (which
holds the binding value of the query results, see C coding below ) to a string
and use the strstr function to do a substring search<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Eg
Char * outcome = strstr(value,Keyword[i]); <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'>If
the substring is not found then the function returns a null value.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>This
just seems a longwinded way of doing things especially if the data file is
large.<br>
Am I thinking along the right lines or totally off track.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><br>
Thanking you in advance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Jagdev
Bhogal<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'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>#include
<stdio.h><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>#include
<rasqal.h><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>#include
<raptor.h><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'>main()<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'>
int i;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_query *rq;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_query_results
*results;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_literal *value;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
raptor_iostream *qo;<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/<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>jagdev/okapi/progs/news.rdf> where (?x rdf:type
rdfs:Class) (?x,rdfs:label, ?la<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>bel), (?x, rdfs:comment, ?comment) using rdf for
<http://www.w3.org/1999/02/22-<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rdf-syntax-ns#>, rdfs for
<http://www.w3.org/2000/01/rdf-schema#>"; <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>const char *qfilename="queryoutput";<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rasqal_init();<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rq=rasqal_new_query("rdql",NULL);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>raptor_init();<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>qo=raptor_new_iostream_to_filename(qfilename);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rasqal_query_prepare(rq,query_string, NULL);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>results=rasqal_query_execute(rq);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>while(!rasqal_query_results_finished(results)) {<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
for(i=0;i<rasqal_query_results_get_bindings_count(results);i++) {<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
const char
*name=rasqal_query_results_get_binding_name(results,i);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_literal *value;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
value=rasqal_query_results_get_binding_value(results,i);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_query_results_write(qo,results,NULL,NULL);<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'>
rasqal_query_results_next(results);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>}<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>raptor_free_iostream(qo);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rasqal_free_query_results(results);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>rasqal_free_query(rq);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>
rasqal_finish();<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:36.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt'>raptor_finish();<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'><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'><o:p> </o:p></span></font></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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