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Posted by nalopaleaahu on 10/02/05 06:08
The transformation is not returning anything new, just the comment
segment as it was before sending it to rdfpic2html. I am trying to
modify http://www.ozhiker.com/electronics/pjmt/ PJMT's JPEG.php to
transform http://jigsaw.w3.org/rdfpic/ rdfpic xml in the comment
segment of jpegs and return it to Example.php
function Interpret_Comment_to_HTML( $jpeg_header_data )
{
// Create a string to receive the output
$output = "";
// read the comment segment
$comment = get_jpeg_Comment( $jpeg_header_data );
// Check if the comment segment was valid
if ( $comment !== FALSE )
{
// Check if the string contains an indicator that there may be
rdfpic metadata
if (stristr($comment, 'PhotoRDF') !== FALSE)
{
$rdfpicdata = stristr($comment, '<?xml');
rdfpic2html( $rdfpicdata );
$output .= "<h2 class=\"JPEG_Comment_RDFPIC_Heading\">JPEG
RDFPIC Metadata</h2>\n";
$output .= "<p
class=\"JPEG_RDFPIC_Text\">$rdfpichtml</p>\n";
}
// Comment exists - add it to the output
$output .= "<h2
class=\"JPEG_Comment_Main_Heading\">JPEG Comment</h2>\n";
$output .= "<p
class=\"JPEG_Comment_Text\">$comment</p>\n";
}
// Return the result
return $output;
}
function rdfpic2html( $rdfpicdata )
{
$arguments = array('/_rdf' => $rdfpicdata);
$xsltproc = xslt_create();
xslt_set_encoding($xsltproc, 'ISO-8859-1');
$rdfpichtml = xslt_process($xsltproc, 'arg:/_rdf', 'rdfpic.xsl',
NULL, $arguments);
// $Toolkit_Dir/$rdfpicxsl not working ? why
if (empty($rdfpichtml)) {
die('XSLT processing error: '. xslt_error($xsltproc));
}
xslt_free($xsltproc);
// echo $rdfpichtml; this returns the correct data to the browser but
not when and where I want it
return $rdfpichtml;
}
rdfpic.xsl:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.w3.org/TR/REC-html40"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:rdfs="http://www.w3.org/TR/1999/PR-rdf-schema-19990303#"
xmlns:DC="http://purl.oclc.org/dc/documents/rec-dces-199809.htm#"
xmlns:Technical="http://www.w3.org/2000/PhotoRDF/technical-1-0#"
xmlns:s0="http://www.w3.org/2000/PhotoRDF/technical-1-0#"
xmlns:s1="http://www.w3.org/2000/PhotoRDF/dc-1-0#"
xmlns:s2="http://sophia.inria.fr/~enerbonn/rdfpiclang#"
version="1.0">
<xsl:comment>is REC-html40 better/more recent?
xmlns="http://www.w3.org/1999/09/28-Photo-ns#"</xsl:comment>
<xsl:output method="html" indent="no"/>
<xsl:comment>These are the only namespaces I have seen used. This is a
catch all template for
all these namespaces and nodes</xsl:comment>
<xsl:template match="DC:*|Technical:*|s2:*|s1:*|s0:*">
<br /><xsl:value-of select="local-name()"/>:
<xsl:apply-templates/>
</xsl:template>
</xsl:stylesheet>
xml array data is:
<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://www.w3.org/1999/09/28-Photo-ns#"
xmlns:DC="http://purl.oclc.org/dc/documents/rec-dces-199809.htm#"
xmlns:Technical="http://www.w3.org/2000/PhotoRDF/technical-1-0#">
<rdf:Description about="for awhile">
<DC:Description>Take one</DC:Description>
<DC:Type>image/jpeg</DC:Type>
<DC:Subject>computers</DC:Subject>
<DC:Source>ccd</DC:Source>
<DC:Rights>public domain</DC:Rights>
<DC:Title>Lets get this working</DC:Title>
<DC:Date>2005-04-20</DC:Date>
<DC:Coverage>USA</DC:Coverage>
<DC:Creator>Me</DC:Creator>
<Technical:devel-date>2005-05-01</Technical:devel-date>
<Technical:lens>Minolta AF70-210</Technical:lens>
<Technical:camera>Minolta800i</Technical:camera>
<Technical:film>Fuji</Technical:film>
</rdf:Description>
</rdf:RDF>
Aloha, Eric
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