Select chunk content from user.head.content template

["Olsen, Morten Engelhardt" <Morten_engelhardt.Olsen@atmel.com>]

As you may or may not know, I have started on cleaning our internal Microsoft Help Viewer 1.0 transformation up to a point where it is releasable to the public. However, in this effort I have come across some issues.

Some background;
The Microsoft HV1 format is the replacement for chm and hlp files. It is based off xhtml with a set of header tags an some special magic. The set of html and other content are zipped into a zip volume with the mshc extension (Microsoft Help Collection or similar ☺). This file (called a package) is accompanied by a manifest file with the extension msha. This file can point to multiple packages, and this collection of packages is called a book.

Now to my first found issue;
The header for a html file needs to contain a set of special meta tags. This is what the help system uses to generate positional/relational information, indexing and content description. Some of these tags needs to contain information of the current chunk (e.g a set of <meta name="Microsoft.Help.F1" content="myTopic" /> for all F1 content in the current chunk). Currently we use indexterms with IDs to mark content for F1 resolution, and the following template is called from “user.head.content”:

<xsl:template name="mshelp3.help.f1">
      <xsl:for-each select="self::*//indexterm">
            <xsl:if test="@id">
                  <meta xmlns="http://www.w3.org/1999/xhtml"; name="Microsoft.Help.F1">
                        <xsl:attribute name="content">
                             <xsl:value-of select="@id" />
                        </xsl:attribute>
                  </meta>
            </xsl:if>
      </xsl:for-each>
</xsl:template>

However, the “self::*//indexterm” matches all indexterms below self, but with a chunk depth of e.g.4, the content of self may be chunked into separate files. So how can I select the content of only the current chunk from “user.head.content”? The current situation is that F1 ids are flowing up in the chunking tree and usually hits on a higher level than were the actual section exists.


Morten Engelhardt Olsen
Software Engineer / Tools Group / Atmel Corporation
Tel: (+47) 930 94 593

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