Unable to update variable

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  • Kevin
    #1

    Unable to update variable

    I am having difficulty updating a variable page-time-stamp in the
    following snippit. The variable time-stamp is initialized from the
    attribute time-stamp from the log element. Some of the page elements
    (children of log) in my XML source have a time-stamp attribute, so I
    want to use the time-stamp from the page for the page-time-stamp
    value. I use an xsl:choose/xsl:when/xsl:otherwise combination to setup
    an if/else statement to select the page-time-stamp value. When I run
    this template, the page-time-stamp value never changes. I only
    displays the initial time-stamp value from the log element. Can anyone
    help me?

    Kevin

    <xsl:template match="log">

    <xsl:variable name="applicati on-name" select="@applic ation-name"/>
    <xsl:variable name="applicati on-version" select="@applic ation-
    version"/>
    <xsl:variable name="time-stamp" select="@time-stamp"/>

    <xsl:variable name="applicati on-string">
    <xsl:value-of select="$applic ation-name"/><xsl:textv</
    xsl:text><xsl:v alue-of select="$applic ation-version"/>
    </xsl:variable>

    <fo:root>

    <fo:layout-master-set>
    <fo:simple-page-master master-name="standard-page" page-
    height="8.5in" page-width="11.0in" margin-top="0.5in" margin-
    bottom="0.5in" margin-left="0.5in" margin-right="0.5in">
    <fo:region-body region-name="xsl-region-body" margin-top="0.25in"/
    >
    <fo:region-before region-name="xsl-region-before" extent="0.25in"/
    >
    </fo:simple-page-master>
    </fo:layout-master-set>

    <xsl:for-each select="page">

    <xsl:variable name="page-number" select="positio n()"/>

    <xsl:choose>
    <xsl:when test="@time-stamp">
    <xsl:variable name="page-time-stamp" select="@time-stamp"/>
    </xsl:when>
    <xsl:otherwis e>
    <xsl:variable name="page-time-stamp" select="$time-stamp"/>
    </xsl:otherwise>
    </xsl:choose>

    <fo:page-sequence master-reference="stan dard-page">

    <xsl:if test="$page-number &gt; 1">
    <fo:static-content flow-name="xsl-region-before">
    <fo:table font-family="Helveti ca, sans-serif" font-
    size="8pt" inline-progression-dimension="100% " table-layout="fixed">
    <fo:table-body>
    <fo:table-row>
    <fo:table-cell text-align="left">
    <fo:block><xsl: value-of
    select="$applic ation-string"/></fo:block>
    </fo:table-cell>
    <fo:table-cell text-align="center">
    <fo:block><xsl: value-of select="$page-
    time-stamp"/></fo:block>
    </fo:table-cell>
    <fo:table-cell text-align="right">
    <fo:block>Pag e <xsl:value-of
    select="$page-number"/>
    </fo:block>
    </fo:table-cell>
    </fo:table-row>
    </fo:table-body>
    </fo:table>
    </fo:static-content>
    </xsl:if>
    Tags: None
    • Kevin
      #2
      Re: Unable to update variable

      On Jun 3, 11:35 am, Kevin <Kevin.S.Par... @alumni.utexas. netwrote:
      I am having difficulty updating a variable page-time-stamp in the
      following snippit. The variable time-stamp is initialized from the
      attribute time-stamp from the log element. Some of the page elements
      (children of log) in my XML source have a time-stamp attribute, so I
      want to use the time-stamp from the page for the page-time-stamp
      value. I use an xsl:choose/xsl:when/xsl:otherwise combination to setup
      an if/else statement to select the page-time-stamp value. When I run
      this template, the page-time-stamp value never changes. I only
      displays the initial time-stamp value from the log element. Can anyone
      help me?
      >
      Kevin
      >
      <xsl:template match="log">
      >
      <xsl:variable name="applicati on-name" select="@applic ation-name"/>
      <xsl:variable name="applicati on-version" select="@applic ation-
      version"/>
      <xsl:variable name="time-stamp" select="@time-stamp"/>
      >
      <xsl:variable name="applicati on-string">
      <xsl:value-of select="$applic ation-name"/><xsl:textv</
      xsl:text><xsl:v alue-of select="$applic ation-version"/>
      </xsl:variable>
      >
      <fo:root>
      >
      <fo:layout-master-set>
      <fo:simple-page-master master-name="standard-page" page-
      height="8.5in" page-width="11.0in" margin-top="0.5in" margin-
      bottom="0.5in" margin-left="0.5in" margin-right="0.5in">
      <fo:region-body region-name="xsl-region-body" margin-top="0.25in"/
      >
      <fo:region-before region-name="xsl-region-before" extent="0.25in"/
      >
      </fo:simple-page-master>
      </fo:layout-master-set>
      >
      <xsl:for-each select="page">
      >
      <xsl:variable name="page-number" select="positio n()"/>
      >
      <xsl:choose>
      <xsl:when test="@time-stamp">
      <xsl:variable name="page-time-stamp" select="@time-stamp"/>
      </xsl:when>
      <xsl:otherwis e>
      <xsl:variable name="page-time-stamp" select="$time-stamp"/>
      </xsl:otherwise>
      </xsl:choose>
      >
      <fo:page-sequence master-reference="stan dard-page">
      >
      <xsl:if test="$page-number &gt; 1">
      <fo:static-content flow-name="xsl-region-before">
      <fo:table font-family="Helveti ca, sans-serif" font-
      size="8pt" inline-progression-dimension="100% " table-layout="fixed">
      <fo:table-body>
      <fo:table-row>
      <fo:table-cell text-align="left">
      <fo:block><xsl: value-of
      select="$applic ation-string"/></fo:block>
      </fo:table-cell>
      <fo:table-cell text-align="center">
      <fo:block><xsl: value-of select="$page-
      time-stamp"/></fo:block>
      </fo:table-cell>
      <fo:table-cell text-align="right">
      <fo:block>Pag e <xsl:value-of
      select="$page-number"/>
      </fo:block>
      </fo:table-cell>
      </fo:table-row>
      </fo:table-body>
      </fo:table>
      </fo:static-content>
      </xsl:if>
      I figured it out. I needed to restructure the variable definition of
      page-time-stamp.


      <xsl:variable name="page-time-stamp">
      <xsl:choose>
      <xsl:when test="@time-stamp">
      <xsl:value-of select="@time-stamp"/>
      </xsl:when>
      <xsl:otherwis e>
      <xsl:value-of select="$time-stamp"/>
      </xsl:otherwise>
      </xsl:choose>
      </xsl:variable>

        Comment

        • Joseph J. Kesselman
          #3
          Re: Unable to update variable

          Kevin wrote:
          I figured it out. I needed to restructure the variable definition of
          page-time-stamp.
          Exactly. XSLT variables are single-assignment and their scope is limited
          to the descendants of their parent element. To use conditionals when
          setting a variable, you have to make the value conditional, not the
          assignment.

            Comment

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