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    Geert Josten and
    Egon Willighagen

    last modified on January 25th 2000.

    XSA doc: xslt-parser.xsa.

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    XML::XSLT Homepage

    XSLT

    You wrote some XML, and have a XSL Template. You want to use this on your website, but want to use Perl with your webserver. No Problem!

      Remember that this project is Work in Progress! Rome wasn't build in one day! Any comment is welcome! Any programming effort as well! This modules *is* great stuff, but it isn't finished yet! However, if you need a xsl command urgently, please email us your request and place it in our high priority to-do list.

      Egon

    XML::XSLT will convert the XML doc on basis of the template. It is written in Perl and works. Not all xsl commands are implemented yet. Nor is it fast. But meanwhile it works: watch it in action. At this moment we need a lot of input. So try this script and give us your comment on it. Missing/needed xsl elements, bugs, anything...

    This document gives some explanation on this project. Other Stuff to read is the Specification of XSLT and the XSL(T)-by-example page (see links). Below, given is a list of XSLT-command's that are supported.

    Supported XSLT commands

    The list of commands that are supported by XML::XSLT has been moved to the online manpage. To see what to upcoming version has to offer, have a look at the manpage of the next version.

    Action!

    Oke, let's see it work. The script takes a project name <project>. The files <project>.xml and <project>.xsl are read and converted to an internal object tree with XML::DOM. Then the XSL template is parsed against the XML tree, which results in a new doc that is redirected to STDOUT. That's all.

    Ofcourse, it need not be HTML. With XSLT you can convert any XML document with any XSL doc you like.

    NB! These are the updated examples. They only work with version 0.13 or higher.

    This is the CML project:

    • This project makes old CML files of the Dictionary on Organic Chemistry conform the newest CML DTD.
    • 91-22-5.cml (old cml file)
    • cml2cml.xsl (for cml to cml conversion)
    • resulting 91-22-5.xml
    • Please note that is you use IE 5.0 to view the result you it gets parsed by the IE XSL parser for a XML2HTML conversion due to the xsl stylesheet below. If so, use right mouse button and view source to see the underlying xml file when viewing the xml file with the stylesheet.
    • cml.xsl
    • The rest of the new CML files are served at the Dictionary on Organic Chemistry project as Physical Properties (example) and at xmltree.com.

    The Agenda project:

    Script options

    The script can be used as an CGI script, but also as a command-line utility. Also accepts a XSL Template other than <project>.xsl. These behaviours are selected with some options. Run xslt-parser without options or parameters at the commandline to view its syntax.

    the -n option
    When a script is to be used with a web-server, its output must be preceeded with a Content-type line. The xslt-parser script does this by default. It can be turned off with the -n(oweb) option.

    the -s option
    By default the script uses the <project>.xsl XSLT template. With the -s(tylesheet) <template.xsl> option other templates can be used.

    Download

    The latest release is v0.21 which needs as always testing (see changelog and manpage). Required are the modules XML::Parser (version 2.23 or higher) and XML::DOM (version 1.25 or higher) which can be obtained from CPAN. Our module also depends on the module LWP::UserAgent as was pointed out by a user. This module can also be downloaded from CPAN.

    A changelog is also available. Older version can be downloaded from this page.

    Bugs

    • xsl:template matching is improved, but predicates are not supported yet
    • xsl:value-of selecting is limited, no functions are supported (not even name() or position())

    Submit new bugs at the on-line bug-report list here!

    What's Next?

    To do:

    • parser options stating how to process comments, pi's and cdata
    • better document source detection (preferable fully automatic)
    • proper implementation of xsl:param/xsl:variable/xsl:with-param
    • mode attribute support for xsl:template and xsl:apply-templates
    • SVC file
    • debugging ofcourse
    • integration of the new XPath module (?)
    • implementation of predicate testing in template matches and node-set selections
    • implementation of function support in value selections
    • and at the end full support of XSL-T

    Links

    XSL-T

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