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NAME

   XML::XSLT - A perl module for processing XSLT

SYNOPSIS

 use XML::XSLT;

 my $xslt = XML::XSLT->new ($xsl, warnings => 1);

 $xslt->transform ($xmlfile);
 print $xslt->toString;

 $xslt->dispose();

DESCRIPTION

This module implements the W3C's XSLT specification. The goal is full implementation of this spec, but we have not yet achieved that. However, it already works well. See XML::XSLT Commands for the current status of each command.

XML::XSLT makes use of XML::DOM and LWP::Simple, while XML::DOM uses XML::Parser. Therefore XML::Parser, XML::DOM and LWP::Simple have to be installed properly for XML::XSLT to run.

Specifying Sources

The stylesheets and the documents may be passed as filenames, file handles regular strings, string references or DOM-trees. Functions that require sources (e.g. new), will accept either a named parameter or simply the argument.

Either of the following are allowed:

 my $xslt = XML::XSLT->new($xsl);
 my $xslt = XML::XSLT->new(Source => $xsl);

In documentation, the named parameter `Source' is always shown, but it is never required.

METHODS

new(Source => $xml [, %args])

Returns a new XSLT parser object. Valid flags are:

DOMparser_args: Hashref of arguments to pass to the XML::DOM::Parser object's parse method.
variables: Hashref of variables and their values for the stylesheet.
base: Base of URL for file inclusion.
debug: Turn on debugging messages.
warnings: Turn on warning messages.
indent: Starting amount of indention for debug messages. Defaults to 0.
indent_incr: Amount to indent each level of debug message. Defaults to 1.

open_xml(Source => $xml [, %args])

Gives the XSLT object new XML to process. Returns an XML::DOM object corresponding to the XML.

base: The base URL to use for opening documents.
parser_args: Arguments to pase to the parser.

open_xsl(Source => $xml, [, %args])

Gives the XSLT object a new stylesheet to use in processing XML. Returns an XML::DOM object corresponding to the stylesheet. Any arguments present are passed to the XML::DOM::Parser.

base: The base URL to use for opening documents.
parser_args: Arguments to pase to the parser.

process(%variables)

Processes the previously loaded XML through the stylesheet using the variables set in the argument.

transform(Source => $xml [, %args])

Processes the given XML through the stylesheet. Returns an XML::DOM object corresponding to the transformed XML. Any arguments present are passed to the XML::DOM::Parser.

serve(Source => $xml [, %args])

Processes the given XML through the stylesheet. Returns a string containg the result. Example:

  use XML::XSLT qw(serve);

  $xslt = XML::XSLT->new($xsl);
  print $xslt->serve $xml;

http_headers: If true, then prepends the appropriate HTTP headers (e.g. Content-Type, Content-Length);
Defaults to true.
xml_declaration: If true, then the result contains the appropriate <?xml?> header.
Defaults to true.
xml_version: The version of the XML.
Defaults to 1.0.
doctype: The type of DOCTYPE this document is. Defaults to SYSTEM.

toString

Returns the result of transforming the XML with the stylesheet as a string.

to_dom

Returns the result of transforming the XML with the stylesheet as an XML::DOM object.

media_type

Returns the media type (aka mime type) of the object.

dispose

Executes the dispose method on each XML::DOM object.

XML::XSLT Commands

xsl:apply-imports no

Not supported yet.

xsl:apply-templates limited

Attribute 'select' is supported to the same extent as xsl:value-of supports path selections.

Not supported yet: - attribute 'mode' - xsl:sort and xsl:with-param in content

xsl:attribute partially

Adds an attribute named to the value of the attribute 'name' and as value the stringified content-template.

Not supported yet: - attribute 'namespace'

xsl:attribute-set yes

Partially

xsl:call-template yes

Takes attribute 'name' which selects xsl:template's by name.

Weak support: - xsl:with-param (select attrib not supported)

Not supported yet: - xsl:sort

xsl:choose yes

Tests sequentially all xsl:whens until one succeeds or until an xsl:otherwise is found. Limited test support, see xsl:when

xsl:comment yes

Supported.

xsl:copy partially

xsl:copy-of limited

Attribute 'select' functions as well as with xsl:value-of

xsl:decimal-format no

Not supported yet.

xsl:element yes

xsl:fallback no

Not supported yet.

xsl:for-each limited

Attribute 'select' functions as well as with xsl:value-of

Not supported yet: - xsl:sort in content

xsl:if limited

Identical to xsl:when, but outside xsl:choose context.

xsl:import no

Not supported yet.

xsl:include yes

Takes attribute href, which can be relative-local, absolute-local as well as an URL (preceded by identifier http:).

xsl:key no

Not supported yet.

xsl:message no

Not supported yet.

xsl:namespace-alias no

Not supported yet.

xsl:number no

Not supported yet.

xsl:otherwise yes

Supported.

xsl:output limited

Only the initial xsl:output element is used. The ``text'' output method is not supported, but shouldn't be difficult to implement. Only the ``doctype-public'', ``doctype-system'', ``omit-xml-declaration'', ``method'', and ``encoding'' attributes have any support.

xsl:param experimental

Synonym for xsl:variable (currently). See xsl:variable for support.

xsl:preserve-space no

Not supported yet. Whitespace is always preserved.

xsl:processing-instruction yes

Supported.

xsl:sort no

Not supported yet.

xsl:strip-space no

Not supported yet. No whitespace is stripped.

xsl:stylesheet limited

Minor namespace support: other namespace than 'xsl:' for xsl-commands is allowed if xmlns-attribute is present. xmlns URL is verified. Other attributes are ignored.

xsl:template limited

Attribute 'name' and 'match' are supported to minor extend. ('name' must match exactly and 'match' must match with full path or no path)

Not supported yet: - attributes 'priority' and 'mode'

xsl:text yes

Supported.

xsl:transform limited

Synonym for xsl:stylesheet

xsl:value-of limited

Inserts attribute or element values. Limited support:

<xsl:value-of select=``.''/>

<xsl:value-of select=``/root-elem''/>

<xsl:value-of select=``elem''/>

<xsl:value-of select=``//elem''/>

<xsl:value-of select=``elem[n]''/>

<xsl:value-of select=``//elem[n]''/>

<xsl:value-of select=``@attr''/>

<xsl:value-of select=``text()''/>

<xsl:value-of select=``processing-instruction()''/>

<xsl:value-of select=``comment()''/>

and combinations of these.

Not supported yet: - attribute 'disable-output-escaping'

xsl:variable experimental

Very limited. It should be possible to define a variable and use it with <xsl:value select=``$varname'' /> within the same template.

xsl:when limited

Only inside xsl:choose. Limited test support:

<xsl:when test=``@attr='value'''>

<xsl:when test=``elem='value'''>

<xsl:when test=``path/[@attr='value']''>

<xsl:when test=``path/[elem='value']''>

<xsl:when test=``path''>

path is supported to the same extend as with xsl:value-of

xsl:with-param experimental

It is currently not functioning. (or is it?)

SUPPORT

General information, bug reporting tools, the latest version, mailing lists, etc. can be found at the XML::XSLT homepage:

  http://xmlxslt.sourceforge.net/

DEPRECATIONS

Methods and interfaces from previous versions that are not documented in this version are deprecated. Each of these deprecations can still be used but will produce a warning when the deprecation is first used. You can use the old interfaces without warnings by passing new() the flag use_deprecated. Example:

 $parser = XML::XSLT->new($xsl, "FILE",
                          use_deprecated => 1);

The deprecated methods will disappear by the time a 1.0 release is made.

The deprecated methods are :

output_string: use toString instead
result_string: use toString instead
output: use toString instead
result: use toString instead
result_mime_type: use media_type instead
output_mime_type: use media_type instead
result_tree: use to_dom instead
output_tree: use to_dom instead
transform_document: use transform instead
process_project: use process instead
open_project: use Source argument to new() and transform instead.
print_output: use serve() instead.

BUGS

Yes.

HISTORY

Geert Josten and Egon Willighagen developed and maintained XML::XSLT up to version 0.22. At that point, Mark Hershberger started moving the project to Sourceforge and began working on it with Bron Gondwana.

LICENCE

AUTHORS

Geert Josten <gjosten@sci.kun.nl>

Egon Willighagen <egonw@sci.kun.nl>

Mark A. Hershberger <mah@everybody.org>

Bron Gondwana <perlcode@brong.net>

Jonathan Stowe <jns@gellyfish.com>