Re: can I *undefine* an attribute via xsl:attribute?

~/t $ cat j.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="2.0">

<xsl:template match="/">
  <output>
    <xsl:call-template name="create-my-attributes"/>
  </output>
</xsl:template>

<xsl:template name="create-my-attributes">
  <xsl:variable name="attrs" as="element()">
    <element>
      <xsl:call-template name="create-their-attributes"/>
    </element>
  </xsl:variable>
  <xsl:copy-of select="$attrs/@* except $attrs/@unwanted-attribute"/>
</xsl:template>

<xsl:template name="create-their-attributes">
  <xsl:attribute name="a" select="'a'"/>
  <xsl:attribute name="unwanted-attribute" select="'z'"/>
  <xsl:attribute name="b" select="'b'"/>
</xsl:template>

</xsl:stylesheet>~/t $ xslt2 j.xsl j.xsl
<?xml version="1.0" encoding="UTF-8"?><output a="a" b="b"/>~/t $

Hi all,

I would like to call a template that creates various attributes, then conditionally *undefine* certain attributes, using some **MAGIC** below:

<xsl:template name="create-my-attributes>
  <xsl:call-template name="create-their-attributes"/>
  <xsl:attribute name="unwanted-attribute" select=**MAGIC**/>
</xsl:template>

A later xsl:attribute definition overrides an earlier value. But can I somehow define an attribute as "undefined" to uncreate it? The spec at

<https://www.w3.org/TR/xslt-30/#creating-attributes>https://www.w3.org/TR/xslt-30/#creating-attributes

doesn't mention this as an option, but I'm a novice and perhaps I missed something.

Thanks!

-----
Chris Papademetrious
Tech Writer, Implementation Group
(610) 628-9718 home office
(570) 460-6078 cell

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