1librasqal(3)               Library Functions Manual               librasqal(3)
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NAME

6       librasqal - Rasqal RDF query library
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SYNOPSIS

9       #include <rasqal.h>
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11       rasqal_world*world=rasqal_new_world();
12       rasqal_query_results *results;
13       raptor_uri *base_uri=raptor_new_uri("http://example.org/foo");
14       rasqal_query *rq=rasqal_new_query(world,"rdql",NULL);
15       const char *query_string="select * from <http://example.org/data.rdf>";
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17       rasqal_query_prepare(rq,query_string,base_uri);
18       results=rasqal_query_execute(rq);
19       while(!rasqal_query_results_finished(results)) {
20        for(i=0;i<rasqal_query_results_get_bindings_count(results);i++) {
21         const char *name=rasqal_query_results_get_binding_name(results,i);
22         rasqal_literal *value=rasqal_query_results_get_binding_value(results,i);
23         /* ... */
24        }
25        rasqal_query_results_next(results);
26       }
27       rasqal_free_query_results(results);
28       rasqal_free_query(rq);
29       raptor_free_uri(base_uri);
30       rasqal_free_world(world);
31
32       cc prog.c -o prog `pkg-config rasqal --cflags` `pkg-config rasqal --libs`
33

DESCRIPTION

35       The  Rasqal  library provides a high-level interface to RDF query pars‐
36       ing, query construction, query execution over an RDF  graph  and  query
37       results manipulation and formatting.  The library provides APIs to each
38       of the steps in the process and provides support for handling  multiple
39       query  language  syntaxes.   At present Rasqal supports most of the W3C
40       SPARQL 1.0 Query language, some of SPARQL 1.1 draft and fully  supports
41       RDQL.
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43       Rasqal  uses  the  libraptor(3) library for providing URI handling, WWW
44       content retrieval and other support functions.
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API REFERENCE

47       See  the  HTML  API  docs  that  may  be  installed  system   wide   at
48       /usr/share/gtk-doc/html/rasqal/      or      on      the     web     at
49       http://librdf.org/rasqal/docs/api/ ⟨http://librdf.org/rasqal/docs/api/⟩
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API CHANGES

52       See     the     Raptor     API     docs     changes     section      at
53       http://librdf.org/rasqal/docs/api/rasqal-changes.html
54       ⟨http://librdf.org/rasqal/docs/api/rasqal-changes.html⟩
55

CONFORMING TO

57       SPARQL Query Language for RDF, Eric  Prud'hommeaux  and  Andy  Seaborne
58       (eds),       W3C       Recommendation,       15       January      2008
59       http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/
60       ⟨http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/⟩
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62       SPARQL Query Results XML Format, Jeen Broekstra and Dave Beckett (eds),
63       W3C Recommendation, 15  January  2008.   http://www.w3.org/TR/2008/REC-
64       rdf-sparql-XMLres-20080115/  ⟨http://www.w3.org/TR/2008/REC-rdf-sparql-
65       XMLres-20080115/⟩
66
67       RDQL - A Query Language for RDF, Andy Seaborne, W3C Member Submission 9
68       January    2004   http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/
69       ⟨http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/⟩
70

SEE ALSO

72       roqet(1),libraptor(3)
73

AUTHOR

75       Dave          Beckett           -           http://purl.org/net/dajobe/
76       ⟨http://purl.org/net/dajobe/⟩
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80                                  2011-01-12                      librasqal(3)
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