Skip to main content

Simple XML/XSLT Navigation

This post presents an example on how to transform a navigation XML with a parameterized XSLT in order to produce a simple site navigation.

Navigation XML

The navigation XML is produced using one of the TBBs described in my earlier posts:

Navigation XML format:

<tcm:ListItems ID="tcm:1-1-4" Title="Root">
  <tcm:Item ID="tcm:1-2-4" Title="010 About Us" DisplayTitle="About Us" Url="/about-us">
    <tcm:Item ID="tcm:1-3-64" Title="010 Who are we?" DisplayTitle="Who are we?" Url="/about-us/who-are-we.html"/>
  </tcm:Item>
  <tcm:Item ID="tcm:1-4-64" Title="020 Contact Us" DisplayTitle="Contact Us" Url="/contact-us.html"/>
</tcm:ListItems>

Navigation XSLT

The full XSLT is available for download. This XSLT takes as parameter the current Page TCMURI as string (parameter name PageUri). It transforms the navigation XML, by identifying the tcm:Item corresponding to the Structure Group parent node of the current Page:

<xsl:stylesheet version="1.0"
    xmlns:fn="http://www.w3.org/2005/xpath-functions"
    xmlns:tcm="http://www.tridion.com/ContentManager/5.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    exclude-result-prefixes="fn tcm xsl">

  <xsl:output omit-xml-declaration="yes" method="html" />

  <xsl:param name="PageUri" />

  <xsl:template match="/">
    <xsl:apply-templates/>
  </xsl:template>

  <xsl:template match="tcm:Item[tcm:Item/@ID=$PageUri]">
    <xsl:call-template name="output-parent-sg">
      <xsl:with-param name="parent-node" select="."/>
    </xsl:call-template>

    <xsl:call-template name="output-sg">
      <xsl:with-param name="parent-node" select="."/>
    </xsl:call-template>

    <xsl:call-template name="output-page">
      <xsl:with-param name="parent-node" select="."/>
    </xsl:call-template>

    <xsl:apply-templates/>
  </xsl:template>

The template continues to apply three transformations:
  • output-parent-sg: outputs a link to the parent Structure Group relative to the current Structure Group, if the parent is not the Root Structure Group. The link URL assumes the default page in the parent Structure Group is index.html. The link text is the value of the parent's attribute DisplayTitle;
  <xsl:template name="output-parent-sg">
    <xsl:param name="parent-node"/>
    <xsl:if test="$parent-node/../@Url">
      <ul>
        <li>
          &lt;-- <a href="{$parent-node/../@Url}/index.html"><xsl:value-of select="$parent-node/../@DisplayTitle"/></a>
        </li>
      </ul>
    </xsl:if>
  </xsl:template>
  • output-sg: outputs a list of links to all sub-Structure Groups relative to the current Structure Group;
  <xsl:template name="output-sg">
    <xsl:param name="parent-node"/>
    <ul>
      <xsl:for-each select="$parent-node/tcm:Item[fn:ends-with(string(@ID),'-4')]">
        <xsl:sort select="@Title"/>
        <li>
          <a href="{@Url}/index.html"><xsl:value-of select="@DisplayTitle"/></a> --&gt;
        </li>
      </xsl:for-each>
    </ul>
  </xsl:template>
  • output-page: outputs a list of links to all Pages within the current Structure Group. The current Page ($PageUri) is highlighted in bold and it is not rendered as link;
  <xsl:template name="output-page">
    <xsl:param name="parent-node"/>
    <ul>
      <xsl:for-each select="$parent-node/tcm:Item[fn:ends-with(string(@ID),'-64')]">
        <xsl:sort select="@Title"/>
        <li>
          <xsl:choose>
            <xsl:when test="@ID=$PageUri">
              <b><xsl:value-of select="@DisplayTitle"/></b>
            </xsl:when>
            <xsl:otherwise>
              <a href="{@Url}"><xsl:value-of select="@DisplayTitle"/></a>
            </xsl:otherwise>
          </xsl:choose>
        </li>
      </xsl:for-each>
    </ul>
  </xsl:template>
</xsl:stylesheet>

The Transformation

In this example, I'm using the <x:transform> tag from REL Standard Tag Library (RSTL) to perform the XML / XSLT transformation.

The following code is part of the Dreamweaver TBB on a Page Template that outputs the navigation:

<c:import url="/wfaf/system/navigation.xml" var="nav-xml"/>
<c:import url="/wfaf/system/navigation.xslt" var="nav-xslt"/>

<x:transform doc="nav-xml" xslt="nav-xslt">
  <x:param var="PageUri" select="@@Page.ID@@" />
</x:transform>

Each Page published on the given Page Template will parameterize the transformation by substituting the DWT variable @@Page.ID@@ with its real value (e.g. tcm:1-2-64).

The Output

Executing the Page produces the following output:


Comments

Popular posts from this blog

Running sp_updatestats on AWS RDS database

Part of the maintenance tasks that I perform on a MSSQL Content Manager database is to run stored procedure sp_updatestats . exec sp_updatestats However, that is not supported on an AWS RDS instance. The error message below indicates that only the sa  account can perform this: Msg 15247 , Level 16 , State 1 , Procedure sp_updatestats, Line 15 [Batch Start Line 0 ] User does not have permission to perform this action. Instead there are several posts that suggest using UPDATE STATISTICS instead: https://dba.stackexchange.com/questions/145982/sp-updatestats-vs-update-statistics I stumbled upon the following post from 2008 (!!!), https://social.msdn.microsoft.com/Forums/sqlserver/en-US/186e3db0-fe37-4c31-b017-8e7c24d19697/spupdatestats-fails-to-run-with-permission-error-under-dbopriveleged-user , which describes a way to wrap the call to sp_updatestats and execute it under a different user: create procedure dbo.sp_updstats with execute as 'dbo' as

Content Delivery Monitoring in AWS with CloudWatch

This post describes a way of monitoring a Tridion 9 combined Deployer by sending the health checks into a custom metric in CloudWatch in AWS. The same approach can also be used for other Content Delivery services. Once the metric is available in CloudWatch, we can create alarms in case the service errors out or becomes unresponsive. The overall architecture is as follows: Content Delivery service sends heartbeat (or exposes HTTP endpoint) for monitoring Monitoring Agent checks heartbeat (or HTTP health check) regularly and stores health state AWS lambda function: runs regularly reads the health state from Monitoring Agent pushes custom metrics into CloudWatch I am running the Deployer ( installation docs ) and Monitoring Agent ( installation docs ) on a t2.medium EC2 instance running CentOS on which I also installed the Systems Manager Agent (SSM Agent) ( installation docs ). In my case I have a combined Deployer that I want to monitor. This consists of an Endpoint and a

SDL Web 8 - Content Delivery Microservices

Among the new features in SDL Web 8 there are the Content Delivery Microservices, namely: Audience Manager Content Deployer Contextual Image Delivery Discovery Service Dynamic Content Dynamic Linking Profiling and Personalization Metadata Query Taxonomy User Generated Content These microservices make up the Content Interaction Services and they expose the existing Content Delivery in-process APIs as RESTful services. They provide the server-side component in a Services-Oriented Architecture and act as data layer between the the web client and the Content Delivery Storage Layer. According to the SDL marketing, these microservices: Simplify upgrades, thus offering shorter time to value Modernize architecture, offering better separation between the web application and Tridion APIs Offer more flexibility with less downtime and improved scalability Improve quality, being self-running, contained and having less dependencies In technical words, these microservices