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.

default_xml_version

Gets and/or sets the default XML version used in the output documents, this will almost certainly want to be 1.0

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.

xml_declaration

Will return an XML declaration element based on the output encoding and XML version.

output_encoding

Gets and/or sets the output encoding that is used in the xml declaration and elsewhere (default: UTF-8)

result_document

An accessor for the XML::DOM object that the transformed document is assembled into.

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.

xml_document

Gets and/or sets the XML::DOM object corresponding to the XML document being processed. The document might be altered during processing.

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.

xsl_document

Gets and/or sets the XML::DOM object corresponding to the XSLT document that is being used for processing, this will be altered during processing so should not be an object that needs to be reused elsewhere.

default_ns

Gets and/or sets the default namespace to be used in the XSL

Returns the templates from the XSL document.

xsl_output_method

Get or set the <xsl:output method= attribute. Valid arguments are 'html', 'text' and 'xml'

cdata_sections

Get or set the element names supplied via the cdata-section-elements attribute (i.e. a space separated list of element names.)

output_version

Gets and/or sets the XML version that will be used for the output (defaults to default_xml_version())

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.

process(%variables)

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

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.

print_result

An alias for print_output

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 partial or from literal text in the stylesheet.

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

Copyright (c) 1999 Geert Josten & Egon Willighagen. All Rights Reserverd. This module is free software, and may be distributed under the same terms and conditions as Perl.

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>

SEE ALSO

XML::DOM, LWP::Simple, XML::Parser

cpanm XML::XSLT

perl -MCPAN -e shell
install XML::XSLT