SCOM Class Hierarchy to Directed Graph Markup

As part of a struggle to get to grips with management pack authoring for Systems Center Operations Manager I wanted a way to diagram the relationships between classes. You can do it with the OpsMgr Authoring kit and Visio… but I don’t have it on my machine. However, with the management pack being xml, it seemed a simple job to transform to directed graph markup language to view inside Visual Studio 2010. Here’s a sample xsl transform.

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
  <xsl:template match="/">
    <DirectedGraph xmlns="http://schemas.microsoft.com/vs/2009/dgml">
      <Nodes>
      </Nodes>
      <Links>
        <xsl:for-each select="ManagementPack/TypeDefinitions/EntityTypes/RelationshipTypes/RelationshipType">
        <Link>
          <xsl:attribute name="Source"><xsl:value-of select="Source"/></xsl:attribute>
          <xsl:attribute name="Target"><xsl:value-of select="Target"/></xsl:attribute>
        </Link>
        </xsl:for-each>
      </Links>
      <Categories>
      </Categories>
    </DirectedGraph>
  </xsl:template>
</xsl:stylesheet>

This seems to work with the sample management pack created on Brian Wren’s blog for an article about embedded Powershell scripts. Using the transform and either the Altova xslt1 processor or the native transform in VS2010 I got a dgml file that displays like this.