Re: [xsl] variable question

Subject: Re: [xsl] variable question
From: Bruce D'Arcus <bdarcus@xxxxxxxxxxxxx>
Date: Tue, 31 Aug 2004 05:55:06 -0400
On Aug 31, 2004, at 3:59 AM, Michael Kay wrote:

If the relevant function call is the one shown, it means that the parent of
the mods:titleInfo context item is not a mods:relatedItem element, therefore
the function has been called with an empty sequence as the argument, which
is not allowed given the way you have declared the parameter.

Here's source fragment.

    <relatedItem type="host">

No matter how I adjust the argument on the template below, I get the same error. So I don't understand what's going on.

<xsl:function name="mods:reftype" as="xs:string">
  <xsl:param name="relatedItem" as="element(mods:relatedItem)" />
    <xsl:when test="$relatedItem/@type = 'host'">
      <xsl:variable name="issuance" as="xs:string"
        select="$relatedItem/mods:originInfo/mods:issuance" />
        <xsl:when test="$issuance = 'continuing'">article</xsl:when>
        <xsl:when test="$issuance = 'monographic'">chapter</xsl:when>

<xsl:template match="mods:titleInfo" mode="title-before">
  <xsl:if test="mods:reftype(parent::mods:relatedItem) = 'chapter'">

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