Re: concatenated key

Given a node, I'm trying to identify/pull out those nodes in the document having the same set of identically named child nodes

The way I'm thinking about doing this is to construct an xsl:key where the value of the key consists of a concatenation of all the @name of its children and then do a select on the key. However, I can't figure out what expression I should have for the use="" attribute of xsl:key, and

I don't think this can be solved with XSLT 1.0 and arbitrary numbers
of children. If you can assert a fixed and preferably low maximum
number of children, you can try
  use="concat(name(*[1]),'#',name(*[2]),name(*[3]))"
etc. The # characters prevent spurious matches.