\xmlatt{}{} has a counterpart \xmlattribute{}{LPATH}{} where one can start the 
search for the attribute at LPATH.
for \xmlchainatt{}{} I am missing such a counterpart 
\xmlchainattribute{}{LPATH}{} where one can do the same.

The problem now is that \xmlchainatt{#1}{att} always finds attribute att when 
it is defined on the node itself.
But consider the case where att="true" exists with the intention to trigger a 
search higher up in the call chain for that same attribute att.
Of course \xmlattribute{#1}{..}{att} is not exactly the same as 
\xmlchainattribute{#1}{..}{att} would be .

yours sincerely
dr. Hans van der Meer

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