OPML processing processing

1. Merge opml files, blog listings

1.

Merge opml files, blog listings

Dave Pawson


I've long run three different sets of blog lists on
3 different PC's. Each time I keep thinking what was
that blog on the other PC?

I've finally written a merge stylesheet.
Takes two opml files and merges them into one.

Enjoy.

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:dp="http://www.dpawson.co.uk/ns#"
  xmlns:xs="http://www.w3.org/2001/XMLSchema-datatypes"
  exclude-result-prefixes='dp xs'
  version="2.0">

  <xsl:param name='file1' select='"a.xml"'/>
  <xsl:param name='file2' select='"b.xml"'/>


  <xsl:variable name="second">
    <xsl:choose>
      <xsl:when test="doc-available($file2)">
        <xsl:sequence select="document($file2/opml/body/outline/*)"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:message terminate='yes'>
          Invalid second file <xsl:value-of select="$file2"/>
        </xsl:message>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  
  <xsl:strip-space elements="*"/>
  <xsl:output method="xml" indent="yes" encoding="utf-8"/>

  <xsl:template match="/" name='initial'>
    <xsl:if test="$file1='a.xml' and $file2='bxml'">
      <xsl:message terminate='yes'>
        Usage: sax2 -it initial file1.opml file2.opml
      </xsl:message>
    </xsl:if>
    <opml version="1.0">
      <head>
        <title>Merged <xsl:value-of select="current-dateTime()"/></title>
      </head>
      <body>
        <xsl:apply-templates select="document($file1)/opml/body/outline/*">
          <xsl:sort select="@text"/>
        </xsl:apply-templates>
      </body>
    </opml>
  </xsl:template>


  <xsl:template match="body/outline">
    <xsl:copy>
      <xsl:copy-of select="@*"/>
      <xsl:apply-templates select="outline | $second"/>
    </xsl:copy>
  </xsl:template>


  <xsl:template match="outline">
    <xsl:copy>
      <xsl:copy-of select="@*"/>
    </xsl:copy>
  </xsl:template>




</xsl:stylesheet>