Hi everyone,

    I just completed updating the DDOM to accept Dublin Core and XHTML annotations in XRules documents. In fact, you can use any type of annotations you like; the DDOM will simply ignore all XML elements that don’t belong to the XRules namespace. You can find the latest update at http://dynamicdom.tigris.org/  

    This approach provides a way to annotate documents using well defined and standardized elements such as those of Dublin Core (http://dublincore.org/) rather than creating proprietary annotations specific to XRules. I read about this first when I learned that RelaxNG uses it, and it seems like a powerful and yet simple solution.

    Here is a sample XRules document that uses both DC and XHTML annotations at different levels in its hierarchy.

<?xml version="1.0" encoding="utf-8" ?>

<xr:rules xmlns:xr="http://www.xrules.org/2003/11"

              xmlns:dc="http://purl.org/dc/elements/1.1/"

              xmlns:xhtml="http://www.w3.org/1999/xhtml">

      <dc:title>Sample XRules Document</dc:title>

      <dc:creator>Waleed K. Abdulla</dc:creator>

      <dc:subject>Test using Dublin Core and XHTML Annotations.</dc:subject>

      <dc:description>This document demonstrates Dublin Core and XHTML annotations.</dc:description>

      <dc:date>2006-06-04</dc:date>

      <dc:language>en</dc:language>

      <dc:rights>Copyright Waleed K. Abdulla.</dc:rights>

      <xhtml:div>

            <xhtml:h1>XRules Test Document</xhtml:h1>

            <xhtml:p>This document demonstrates using XHTML

                  and <xhtml:a href="http://dublincore.org/">Dublin Core</xhtml:a>

                  annotations.

            </xhtml:p>

      </xhtml:div>

      <xr:ruleset context="root">

            <dc:description>This ruleset applies to the root element.</dc:description>

            <xr:validate test="value &gt; 2">

                  <dc:description>Test annotation of validate rules.</dc:description>

            </xr:validate>

            <xr:calculate target="result" createNode="first">

                  <dc:description>Test annotation of calculate rules.</dc:description>

                  <xr:value>value * 2</xr:value>

            </xr:calculate>

            <xr:bind target="result" max="10">

                  <xhtml:p>Test annotation of bind rules.</xhtml:p>

                  <xr:valueset values="config('numbers')/value">

                        <dc:description>Test annotation of valueset rules.</dc:description>

                  </xr:valueset>

            </xr:bind>

      </xr:ruleset>

</xr:rules>

Best Regards,

Waleed