Xpath try catch not allowed in XSLT?

Ihe Onwuka <[email protected]> Sun, 13 Sep 2020 14:09:59 -0400

Newsgroups	gmane.text.xml.saxon.help,gmane.text.xml.xsl.general.mulberrytech
Message-ID	<CALfs7+wBXhDU5LoexDX+zemmZBnFTyTAL70uCzWRsXpwjg3yxQ@mail.gmail.com>

Error near {... (try {key} at char 73 in xsl:element/@namespace on line 98
column 55 of translator.xsl:
  XPST0003  try/catch expressions are not allowed in XPath

I am running Saxon 10.2

My use case was wanting to use the zero-or-one XPath function which does
exactly what I want but returns an error where I want an empty () node
returned.

hence

 try {zero-or-one($someSequence)}
        catch * {()}

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