<?xml version='1.0' encoding='utf-8'?>
<?xml-stylesheet href="/style/browser.xsl" type="text/xsl"?>
<essay xmlns="http://docbook.org/ns/docbook"
       xmlns:xlink="http://www.w3.org/1999/xlink"
       xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
       xmlns:dc='http://purl.org/dc/elements/1.1/'
       xmlns:dcterms="http://purl.org/dc/terms/"
       xmlns:gal='http://norman.walsh.name/rdf/gallery#'
       xmlns:foaf="http://xmlns.com/foaf/0.1/"
       xml:lang="en"
       version='5.0'>
<info>
<title>The XML Pipeline Processor</title>
<volumenum>10</volumenum>
<issuenum>66</issuenum>
<pubdate>2007-07-10T12:17:01-04:00</pubdate>
<date>$Date: 2007-07-10 12:55:06 -0400 (Tue, 10 Jul 2007) $</date>
<author><personname>
<firstname>Norman</firstname><surname>Walsh</surname>
</personname></author>
<copyright><year>2007</year><holder>Norman Walsh</holder></copyright>
<abstract>
<para>Announcing the first release of the <citetitle>XML Pipeline Processor</citetitle>,
my implementation of <citetitle xlink:href="http://www.w3.org/TR/xproc/">XProc:
An XML Pipeline Processor</citetitle>.</para>
</abstract>
</info>

<para xml:id='p1'>At last, I'm releasing my nascent XProc processor.
You'll find all the details on the
<link xlink:href="/2007/projects/xproc">project status page</link>.</para>

<para xml:id='p2'>Fair warning: this release is <emphasis>extremely</emphasis>
alpha. In addition to scant documentation and a woefully inadequate
test suite, it is known to have the following bugs:</para>

<itemizedlist>
<listitem>
<para xml:id='p3'>The defaulting story for primary inputs and outputs (i.e., a pipeline with
no declared inputs gets an anonymous input if it's needed) is not supported.
</para>
</listitem>
<listitem>
<para xml:id='p4'>There is no command-line syntax for binding options.
</para>
</listitem>
<listitem>
<para xml:id='p5'>Parameters bound on the command-line are ignored.
</para>
</listitem>
<listitem>
<para xml:id='p6'>The following steps are not implemented:
<function>p:error</function>,
<function>p:xsl-formatter</function>,
and <function>p:xquery</function>.
</para>
</listitem>
<listitem>
<para xml:id='p7'>The <function>p:http-request</function> step is incompletely and incorrectly
implemented.
</para>
</listitem>
<listitem>
<para xml:id='p8'>A large, almost random collection of debugging messages are printed.
</para>
</listitem>
<listitem>
<para xml:id='p9'>Error reporting is abysmal.
</para>
</listitem>
</itemizedlist>

<para xml:id='p10'>No doubt it has many others.</para>

<para xml:id='p11'>However, it does implement a fair chunk of the specification and it does
work for me, so maybe it'll work for you. I suggest you read the
<link xlink:href="https://xproc.dev.java.net/release-notes.html">release notes</link>
before deciding if it's something you want to try today.</para>

<para xml:id='p12'>Bug reports and other comments most welcome. I expect to continue to work
on making it complete and correct at least until the XProc specification has
successfully exited its candidate recommendation phase.</para>

</essay>
