apply-string-subst-map — Apply a string-substitution map
This function applies a “string substitution” map. Use it when
  you want to do multiple string substitutions on the same target
  content. It reads in two things: content, the
  content on which to perform the substitution, and
  map.contents, a node set of
  elements (the names of the elements don't matter), with each element
  having the following attributes:
  
oldstring, a string to
      be replaced
    newstring, a string with
      which to replace oldstring
    
  The function uses map.contents to
  do substitution on content, and then
  returns the modified contents.
This function is a very slightly modified version of Jeni
    Tennison’s replace_strings function in the
    multiple string replacements section of Dave Pawson’s
    XSLT
    FAQ.
The apply-string-subst-map function is
    essentially the same function as the
    apply-character-map function; the only
    difference is that in the map that
    apply-string-subst-map expects, oldstring and newstring attributes are used instead of
    character and string attributes.
    <xsl:template name="apply-string-subst-map">
      <xsl:param name="content"></xsl:param>
      <xsl:param name="map.contents"></xsl:param>
      <xsl:variable name="replaced_text">
        <xsl:call-template name="string.subst">
          <xsl:with-param name="string" select="$content"></xsl:with-param>
          <xsl:with-param name="target" select="$map.contents[1]/@oldstring"></xsl:with-param>
          <xsl:with-param name="replacement" select="$map.contents[1]/@newstring"></xsl:with-param>
        </xsl:call-template>
      </xsl:variable>
      <xsl:choose>
        <xsl:when test="$map.contents[2]">
          <xsl:call-template name="apply-string-subst-map">
            <xsl:with-param name="content" select="$replaced_text"></xsl:with-param>
            <xsl:with-param name="map.contents" select="$map.contents[position() > 1]"></xsl:with-param>
          </xsl:call-template>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="$replaced_text"></xsl:value-of>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:template>