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Re: Dmoz xml structure sort

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Subject: Re: Dmoz xml structure sort
From: Robert Koberg <rob@xxxxxxxxxx>
Date: Sun, 18 Apr 2004 07:15:07 -0700

Hi,

I think you are on the right track, but I would suggest changing your schema a bit. I would organize your topics hierarchically and have a unique ID and a name (names are more likely to have duplicates) attribute, like:

<topic id="t123" name="Base">
  <Title local="en-US">Home</Title>
  <topic id="t234" name="General_Information">
    <topic id="t345" name="About_us">

    </
    <topic id="t346" name="Contact_us">

    </
  </
</

With this structure you will be able to many more things than you have probably thought of at this point and you do not need to list the //narrow elements because they are now there. This means you can move things around and you wont' have to edit your topics config.

Now, on to some XSL:

First thing to do is create a top level key:

<xsl:key name="topics" match="topic" use="@id"/>

Then I usually pass the 'focus' id into the transformation as a parameter, so if you can do that you can get your focus topic in a top level variable:

<xsl:variable
  name="focus_topic"
  select="key('topics', $focus_topic_id)"/>

<xsl:variable
  name="focus_parent"
  select="key('topics', $focus_parent_id)"/>

Then you can use this variable throughout your transformation to find your topic context. You can ensure you always have valid links by first going to the linked topic nodeset and then traveling up and down the topic hierarchy to find the path. Say you want to create a nav thingy - you can do it like so:

<xsl:template match="/">
  <html>
    <xsl:call-template name="head"/>
    <body>
      <div id="pageBody">
        <xsl:call-template name="banner"/>

<div id="navColumn">

          <xsl:apply-templates
            select="$focus_parent/*"
            mode="navigation"/>

</div>

        <div id="contentWrapper">
          <xsl:appl
        <xsl:call-template name="footer"/>
      </div>
    </body>
  </html>
</xsl:template>


<!-- match the children of the focus parent-->
<xsl:template match="*" mode="navigation">

  <xsl:variable name="href">
    <xsl:call-template name="topic_path_builder"/>
  </

  <xsl:choose>
    <xsl:when test="not(@id=$focus_topic_id)">
      <div>
        <a href="{$href}">
          <xsl:value-of select="@label"/>
        </a>
      </div>
    </
    <xsl:otherwise>
      <div class="selected">
        <a href="{$href}">
          <xsl:value-of select="@label"/>
        </a>
      </div>
    </
  </
</

<xsl:template name="topic_path_builder">
  <xsl:call-template name="ancestor_path"/>
  <xsl:text>/</xsl:text>
  <xsl:value-of select="@name"/>
</xsl:template>

<!-- root relative paths,
you could do document relative paths too-->

<xsl:template name="ancestor_path">
  <xsl:for-each select="ancestor::*">
    <xsl:text>/</xsl:text>
    <xsl:value-of select="@name"/>
  </xsl:for-each>
</xsl:template>

make sense?

best,
-Rob

John Hamman wrote:

Hi all.
I have a navigational site tree xml page similar to Dmoz.org.
And its made up like this below. I am new to xpath and am having problems
finding a solution to this.

My file looks similar to this.

<Topic id="Base">
			<tag catid="1"/>
			<Title local="en-US">Home</Title>
			<narrow resource="Base/General_Information"/>
			<narrow resource="Base/StudentLife"/>
			<narrow resource="Base/Missions"/>
			<narrow resource="Base/Community"/>
			<narrow resource="Base/Academics"/>
			<narrow resource="Base/News"/>
		</Topic>
		<Topic id="Base/General_Information">
			<tag catid="2"/>
			<Title local="en-US">General Information</Title>
			<narrow
resource="Base/General_Information/About_us"/>
			<narrow
resource="Base/General_Information/Contact_us"/>
			<narrow
resource="Base/General_Information/Directors_Letter"/>
			<narrow
resource="Base/General_Information/History"/>
			<narrow
resource="Base/General_Information/What_We_Beleive"/>
			<narrow
resource="Base/General_Information/Staff_Directory"/>
		</Topic>
		<Topic id="Base/General_Information/About_us">
			<tag catid="8"/>
			<Title local="en-US">About Us</Title>
		</Topic>
		<Topic id="Base/General_Information/Contact_us">
			<tag catid="9"/>
			<Title local="en-US">Contact Us</Title>
		</Topic>
...
...
...

And I want to acheave results like this if I had a dynamic variable like "Base/General_Information/About_us"

<Topic id="Base/General_Information/About_us">
			<tag catid="8"/>
			<Title local="en-US">About Us</Title>
		</Topic>
		<Topic id="Base/General_Information/Contact_us">
			<tag catid="9"/>
			<Title local="en-US">Contact Us</Title>
		</Topic>
		<Topic id="Base/General_Information/Directors_Letter">
			<tag catid="10"/>
			<Title local="en-US">Letter From the
Director</Title>
		</Topic>
		<Topic id="Base/General_Information/History">
			<tag catid="11"/>
			<Title local="en-US">History</Title>
		</Topic>
		<Topic id="Base/General_Information/What_We_Beleive">
			<tag catid="12"/>
			<Title local="en-US">What We Beleive</Title>
		</Topic>
		<Topic id="Base/General_Information/Staff_Directory">
			<tag catid="13"/>
			<Title local="en-US">Staff Directory</Title>
		</Topic>

Can someone point me in the right direction?
john

Current Thread

Dmoz xml structure sort, (continued)

<- Previous	Index	Next ->
RE: Dmoz xml structure sort, John Hamman	Thread	Ideal XML Site tree layout, John Hamman
RE: Dmoz xml structure sort, John Hamman	Date	select unique name, Sylwester Lesniak
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