RE: Finding out if the current node is an attribute no

test="count(.|../@id)=1" is only true when the current node is an attribute "id".

test="count(.|../self::somenode/@id)=1" is only true when the current node is an attribute named "id" and it is attached to an element named "somenode".
...
Consider that the attribute tests I have count the number of nodes in the union of the current node and the current node's "id" attribute

... since XPath 1.0 nodes are not duplicated in a node set, the union will only produce a singleton node set when the current node *is* the node being addressed.

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