1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Serializing example code: Raptor RDF Syntax Library Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="index.html" title="Raptor RDF Syntax Library Manual">
<link rel="up" href="tutorial-serializing.html" title="Serializing RDF triples to a syntax">
<link rel="prev" href="tutorial-serializer-destroy.html" title="Destroy the serializer">
<link rel="next" href="reference-manual.html" title="Part II. Raptor Reference Manual">
<meta name="generator" content="GTK-Doc V1.33.1 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts"></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="tutorial-serializing.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="tutorial-serializer-destroy.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="reference-manual.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="tutorial-serializer-example"></a>Serializing example code</h2></div></div></div>
<div class="example">
<a name="raptor-example-rdfcat"></a><p class="title"><b>Example 4. <code class="filename">rdfcat.c</code>: Read any RDF syntax and serialize to RDF/XML (Abbreviated)</b></p>
<div class="example-contents">
<pre class="programlisting">
#include <stdio.h>
#include <raptor2.h>
/* rdfcat.c: parse any RDF syntax and serialize to RDF/XML-Abbrev */
static raptor_serializer* rdf_serializer;
static void
serialize_triple(void* user_data, raptor_statement* triple)
{
raptor_serializer_serialize_statement(rdf_serializer, triple);
}
static void
declare_namespace(void* user_data, raptor_namespace *nspace)
{
raptor_serializer_set_namespace_from_namespace(rdf_serializer, nspace);
}
int
main(int argc, char *argv[])
{
raptor_world *world = NULL;
raptor_parser* rdf_parser = NULL;
unsigned char *uri_string;
raptor_uri *uri, *base_uri;
world = raptor_new_world();
uri_string = raptor_uri_filename_to_uri_string(argv[1]);
uri = raptor_new_uri(world, uri_string);
base_uri = raptor_uri_copy(uri);
/* Ask raptor to work out which parser to use */
rdf_parser = raptor_new_parser(world, "guess");
raptor_parser_set_statement_handler(rdf_parser, NULL, serialize_triple);
raptor_parser_set_namespace_handler(rdf_parser, NULL, declare_namespace);
rdf_serializer = raptor_new_serializer(world, "rdfxml-abbrev");
raptor_serializer_start_to_file_handle(rdf_serializer, base_uri, stdout);
raptor_parser_parse_file(rdf_parser, uri, base_uri);
raptor_serializer_serialize_end(rdf_serializer);
raptor_free_serializer(rdf_serializer);
raptor_free_parser(rdf_parser);
raptor_free_uri(base_uri);
raptor_free_uri(uri);
raptor_free_memory(uri_string);
raptor_free_world(world);
return 0;
}
</pre>
<p>Compile it like this:
</p>
<pre class="screen">
$ gcc -o rdfcat rdfcat.c `pkg-config raptor2 --cflags --libs`
</pre>
<p>
and run it on an RDF file as:
</p>
<pre class="screen">
$ ./rdfcat raptor.rdf
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://usefulinc.com/ns/doap#">
<rdf:Description rdf:about="">
<foaf:maker>
<foaf:Person>
<foaf:name>Dave Beckett</foaf:name>
...
</pre>
<p>
</p>
</div>
</div>
<br class="example-break">
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.33.1</div>
</body>
</html>
|
