Function and Query Evaluation with No XML Tags Error

[David Carlisle]

 for $r in $seq[not(string(.)=string((child::*)[1]))]
   return $r

Means exactly the same thing as

$seq[not(string(.)=string((child::*)[1]))]


(for $r in ... return $r  is always the same as ...)

so that returns any item in $seq whose string value is not the same as
the string value of its first element child.

In your examples, $seq is a sequence of head elements. The head elements
have no element children so string(.) is the string such as "Stamp
Collecting Outfit" and string((child::*)[1] is "" in all cases
so these are never equal and your filter never removes any nodes.

David

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