[xsl] XSLT1.0 distinct list of attributes across several nodes

Subject: [xsl] XSLT1.0 distinct list of attributes across several nodes
From: "Mark Anderson mark.anderson@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 25 Jun 2018 18:52:05 -0000
I'm restricted to XSLT1.0 with no extensions.
I need to get a list of distinct attributes across a set of nodes.

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