Hi Magnus,

Give the following a try:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
  xmlns:marc="http://www.loc.gov/MARC21/slim";
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="text" encoding="UTF-8" indent="no"/>
<xsl:template match="marc:record">
  <xsl:if test="marc:datafield[starts-with(@tag,'65')]">
    <xsl:for-each select="marc:datafield[starts-with(@tag,'65')]">
      <xsl:if test="@tag=650">
        <xsl:for-each select="marc:subfield">
          <xsl:choose>
            <xsl:when test="@code='2'">
              <xsl:variable name="twoval" select="."/>
              <xsl:if test="($twoval='x') or ($twoval='y')">
                <xsl:value-of select="preceding-sibling::*[@code='a']"/>
                <xsl:text>&#xa;</xsl:text>
              </xsl:if>
            </xsl:when>
          </xsl:choose>
        </xsl:for-each>
      </xsl:if>
      <xsl:if test="@tag!=650">
        <xsl:for-each select="marc:subfield">
          <xsl:choose>
            <xsl:when test="@code='a'">
              <xsl:value-of select="."/>
              <xsl:text>&#xa;</xsl:text>
            </xsl:when>
          </xsl:choose>
        </xsl:for-each>
      </xsl:if>
    </xsl:for-each>
  </xsl:if>
</xsl:template>
</xsl:stylesheet>

Regards,
Andreas

P.S.: There's probably a much better way of doing this... ;-)

On 2021-03-02 14:22, Magnus Enger wrote:
Kia ora!

I want to display most keywords as usual, but with an exception for those from the 650 field. Specifically, I want to display only those keywords that has the value "x" or "y" in subfield $2, and hide the other 650-keywords. Any hints on how to this in XSLT would be infinitely appreciated, and added to the wiki, so others can benefit from the solution.

Here is an example:

   <datafield tag="650" ind1=" " ind2="0">
     <subfield code="a">A</subfield>
     <subfield code="2">x</subfield>
   </datafield>
   <datafield tag="650" ind1=" " ind2="0">
     <subfield code="a">B</subfield>
     <subfield code="2">y</subfield>
   </datafield>
   <datafield tag="650" ind1=" " ind2="0">
     <subfield code="a">C</subfield>
     <subfield code="2">z</subfield>
   </datafield>
   <datafield tag="653" ind1=" " ind2="0">
     <subfield code="a">D</subfield>
   </datafield>

I want to display A and B (because they have $2 = x or y), and D (because it is not 650), but not C (because it is 650 and $2 is neither x nor y).

Best regards,
Magnus
Libriotech
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