In getting to the solution below I found that
". = ../namespace::*[name()]"
as "is-namespace()" test is even simpler than Michael's
"count(. | ../@*) != count(../@*)".
Similarly ". = ../attribute::*[name()]" can be used as "is-attribute()".
It might be simpler, but it's wrong. Firstly, the expression
attribute::*[name()] is rather pointless: it selects all attribute that
have a name, and all of them do. While namespace::*[name()] selects all
namespaces except the default namespace, so your test will fail for that
one.
Secondly, it's quite possible to have an attribute and a namespace with
the same string-value, for example
<xs:schema xmlns:a="http://my.namespace/";
targetNamespace="http://my.namespace/";>
and in this case your test for a namespace and your test for an
attribute will both return true.
Michael Kay
Saxonica
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