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  1.  
  2.  
  3. XML for Beginners: Part 2
  4. _________________________
  5.  
  6.  
  7.  
  8. Here's an example of an "extended" link.
  9.  
  10. <list xmlns:xlink="http://www.w3.org/1999/xlink" 
  11.         xlink:type="extended">
  12.         <!-- Bands and their members -->
  13.         <band    xlink:type="locator" xlink:role="band"
  14.               xlink:href="the_prodigy.xml"/>
  15.         <member xlink:type="locator" xlink:label="member"
  16.               xlink:href="leeroy.xml"/>
  17.         <member xlink:type="locator" xlink:label="member"
  18.               xlink:href="liam.xml"/>
  19.         <member xlink:type="locator" xlink:label="member"
  20.               xlink:href="keith.xml"/>
  21.         <member xlink:type="locator" xlink:label="member"
  22.               xlink:href="maxim.xml"/>
  23.         <bind xlink:type="arc" xlink:from="band"
  24.               xlink:to="member"/>
  25.       </list>
  26.  
  27.  
  28. **********
  29.  
  30.  
  31. The best method of incorporating images is to use xlink:
  32.  
  33. <?xml version="1.0"?>
  34. <wines xmlns="http://www.mysite.com/wines"
  35.          xmlns:xlink="http://www.w3.org/1999/xlink">
  36.  <brand marque="Caliterra"
  37.           xlink:type="simple"
  38.           xlink:href="http://www.mysite.com/wines/caliterra">
  39.   <description xlink:type="simple"   xlink:href="http://www.mysite.com/wines/caliterra/label.jpg"
  40.                xlink:actuate="onLoad" xlink:show="embed">
  41.    A smooth label for a smooth wine.
  42.   </description>
  43.  </brand>
  44. </wines>
  45.  
  46.  
  47. **********
  48.  
  49.  
  50. Here's our stylesheet for turning XML into HTML. Confusingly, all XSLT files are themselves written in XML format, so the file starts with an XML declaration. On the third line it goes on to identify itself as XSLT. 
  51.  
  52. <?xml version="1.0"?>
  53. <xsl:stylesheet
  54.   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  55.   xmlns="http://www.w3.org/TR/REC-html40"
  56.   version="1.0">
  57. <xsl:output method="html"/>
  58.  
  59. <xsl:template match="/">
  60. <HTML><HEAD><TITLE>TinHat Security Newsletter</TITLE></HEAD>
  61. <BODY><H1>TinHat Security Newsletter</H1>
  62.   <H2>Today's Battlefields</H2>
  63.   <xsl:for-each select="News/Item">
  64.    <P><A HREF="#{generate-id(.)}">
  65.      <xsl:value-of select="Title"/></A><BR/>
  66.      <SMALL>by <xsl:value-of select="Author"/></SMALL><BR/>
  67.      <xsl:value-of select="Abstract"/></P>
  68.   </xsl:for-each>
  69. </BODY></HTML>
  70. </xsl:template>
  71.  
  72. </xsl:stylesheet>
  73.  
  74.  
  75. **********
  76.  
  77.  
  78. That doesn't make a lot of sense on its own, separated from the XML data file that it applies to, so let's take a look at that:
  79.  
  80. <?xml version="1.0"?>
  81. <News>
  82.   <URL>http://oemcomputer/index</URL>
  83.   <Item>
  84.    <Title>Watch out for Klez!</Title>
  85.    <Author>Andrew Starling</Author>
  86.    <Abstract>If you haven't downloaded the Microsoft patch to protect against Klez, get it right now.</Abstract>
  87.    <Para>Probably the worst aspect of the Klez virus is that you don't need to open an attachment to catch it etcà </Para>
  88.    <Para>Second paragraph, and so on</Para>
  89.   </Item>
  90.   </News>
  91.  
  92.  
  93. ***********
  94.  
  95.  
  96. WML is itself a kind of XML, which is why there are references to XML in the xsl:output line of the XSLT file that follows.
  97.  
  98. <?xml version="1.0"?>
  99.  
  100. <xsl:stylesheet
  101.   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  102.   version="1.0">
  103.  
  104. <xsl:output
  105.   method="xml"
  106.   doctype-public="-//WAPFORUM//DTD WML 1.1//EN"
  107.   doctype-system="http://www.wapforum.org/DTD/wml_1.1.xml"/>
  108.  
  109. <xsl:template match="/">
  110. <wml>
  111. <card id="toc" title="TinHat Security Newsletter">
  112.   <p align="center"><b>Today's Battlefields</b></p>
  113.   <xsl:for-each select="News/Item">
  114.    <p><anchor><xsl:value-of select="Title"/><go
  115.      href="#{generate-id(.)}"/></anchor></p>
  116.   </xsl:for-each>
  117. </card>
  118. </wml>
  119. </xsl:template>
  120. </xsl:stylesheet>
  121.  
  122.  
  123. ***********
  124.  
  125.  
  126.