xml validation of generated rdf fails at !ENTITY declaration because of incorrect url coding in localized name of "Special"
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	• bzimport
	Jul 2 2010, 2:32 PM

Description

Author: baratiza

Description:
MediaWiki 1.15.4
PHP 5.2.6-1+lenny8 (apache2handler)
MySQL 5.0.51a-24

Semantic MediaWiki (verzió: 1.5.0_0)

Steps to reproduce:

Install MediaWiki

!>>set Hungarian as the language of the wiki<<!

Install Semantic Mediawiki extensions

export rdf of the main page (I do it with "Semantic Radar" Firefox extension )

<link rel="alternate" type="application/rdf+xml" title="Speciális:Névjegy" href="/Z/index.php?title=Speci%C3%A1lis:ExportRDF/Speci%C3%A1lis:N%C3%A9vjegy&xmlmime=rdf" />

result:
XML validation of generated RDF fails

details:

-Fatal Error Messages

FatalError: The parameter entity reference "%C3;" must end with the ';' delimiter.[Line = 7, Column = 56]

-The original RDF/XML document

1: <?xml version="1.0" encoding="UTF-8"?>
2: <!DOCTYPE rdf:RDF[
3: <!ENTITY rdf 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
4: <!ENTITY rdfs 'http://www.w3.org/2000/01/rdf-schema#'>
5: <!ENTITY owl 'http://www.w3.org/2002/07/owl#'>
6: <!ENTITY swivt 'http://semantic-mediawiki.org/swivt/1.0#'>
7: <!ENTITY wiki 'http://zolta.homelinux.org/Z/w/Speci%C3%A1lis:URIResolver/'>
8: <!ENTITY property 'http://zolta.homelinux.org/Z/w/Speci%C3%A1lis:URIResolver/Property-3A'>
9: <!ENTITY wikiurl 'http://zolta.homelinux.org/Z/w/'>
10: ]>
11:
12: <rdf:RDF
13: xmlns:rdf="&rdf;"
14: xmlns:rdfs="&rdfs;"
15: xmlns:owl ="&owl;"
16: xmlns:swivt="&swivt;"
17: xmlns:wiki="&wiki;"
18: xmlns:property="&property;">
19: 
20: <owl:Ontology rdf:about="&wikiurl;Speci%C3%A1lis:ExportRDF/KezdQlap">
21: <swivt:creationDate rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2010-07-02T16:18:23+02:00</swivt:creationDate>
22: <owl:imports rdf:resource="http://semantic-mediawiki.org/swivt/1.0" />
23: </owl:Ontology>

Version: unspecified
Severity: normal

Details

Reference: bz24234

Event Timeline

• bzimport raised the priority of this task from to Medium.Nov 21 2014, 11:11 PM

• bzimport added a project: MediaWiki-extensions-Semantic-MediaWiki.

• bzimport set Reference to bz24234.

• bzimport created this task.Jul 2 2010, 2:32 PM

baratiza wrote:

EXPECTED

urls in ENTITY declaration should be encoded with XML Character Reference
á
should be encoded
á

line 7 and 8 should be

7: <!ENTITY wiki
'http://zolta.homelinux.org/Z/w/Speciális:URIResolver/'>
8: <!ENTITY property

'http://zolta.homelinux.org/Z/w/Speciális:URIResolver/Property-3A'>

Question

Where in the code jungle is the line we need to change
What PHP function does this encoding?

baratiza wrote:

-I guess the problem is in

$IP/extensions/SemanticMediaWiki/includes/export/SMW_Exporter.php

-maybe the line:
SMWExporter::encodeURI(urlencode(str_replace(' ', '_', $wgContLang->getNsText(SMW_NS_PROPERTY) . ':')));

karima.rafes wrote:

You can check your exportRDF with this form :

http://www.w3.org/RDF/Validator/

karima.rafes wrote:

I found a quick fix.
I added str_replace('%','%',URL) in the file include/export/SMW_OWLExport.php in the function printHeader.

protected function printHeader( $ontologyuri = '' ) {

		global $wgContLang;

		$this->pre_ns_buffer .=
			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" .
			"<!DOCTYPE rdf:RDF[\n" .
			"\t<!ENTITY rdf '"   . SMWExporter::expandURI( '&rdf;' )   .  "'>\n" .
			"\t<!ENTITY rdfs '"  . SMWExporter::expandURI( '&rdfs;' )  .  "'>\n" .
			"\t<!ENTITY owl '"   . SMWExporter::expandURI( '&owl;' )   .  "'>\n" .
			"\t<!ENTITY swivt '" . SMWExporter::expandURI( '&swivt;' ) .  "'>\n" .
			// A note on "wiki": this namespace is crucial as a fallback when it would be illegal to start e.g. with a number. In this case, one can always use wiki:... followed by "_" and possibly some namespace, since _ is legal as a first character.
			"\t<!ENTITY wiki '"  . str_replace('%','&#37;',SMWExporter::expandURI( '&wiki;' )) .  "'>\n" .
			"\t<!ENTITY property '" . str_replace('%','&#37;',SMWExporter::expandURI( '&property;' )) .  "'>\n" .
			"\t<!ENTITY wikiurl '" . str_replace('%','&#37;',SMWExporter::expandURI( '&wikiurl;' )) .  "'>\n" .
			"]>\n\n" .
			"<rdf:RDF\n" .
			"\txmlns:rdf=\"&rdf;\"\n" .
			"\txmlns:rdfs=\"&rdfs;\"\n" .
			"\txmlns:owl =\"&owl;\"\n" .
			"\txmlns:swivt=\"&swivt;\"\n" .
			"\txmlns:wiki=\"&wiki;\"\n" .
			"\txmlns:property=\"&property;\"";
		$this->global_namespaces = array( 'rdf' => true, 'rdfs' => true, 'owl' => true, 'swivt' => true, 'wiki' => true, 'property' => true );

		$this->post_ns_buffer .=
			">\n\t<!-- Ontology header -->\n" .
			"\t<owl:Ontology rdf:about=\"$ontologyuri\">\n" .
			"\t\t<swivt:creationDate rdf:datatype=\"http://www.w3.org/2001/XMLSchema#dateTime\">" . date( DATE_W3C ) . "</swivt:creationDate>\n" .
			"\t\t<owl:imports rdf:resource=\"http://semantic-mediawiki.org/swivt/1.0\" />\n" .
			"\t</owl:Ontology>\n" .
			"\t<!-- exported page data -->\n";

}

I have now implemented the above "quick fix" which I think is the proper way to solve the problem. The symbol % that is correctly used in the problematic URLs has a special meaning in XML ENTITY declarations and must be escaped in this way. The fix will be released with SMW 1.5.2.

xml validation of generated rdf fails at !ENTITY declaration because of incorrect url coding in localized name of "Special"Closed, ResolvedPublicActions