Given an select expression and a context, evaluate the XPath and return the
Return the first node out of the nodeset, if this expression is a nodeset
expression. This is the de
Detaches the iterator from the set which it iterated over, releasing any
computational resources and
Get the analysis bits for this walker, as defined in the WalkerFactory.
Returns the axis being iterated, if it is known.
The node context from where the expression is being executed from (i.e. for