The local-name() function returns the local name (the part after the colon if there is one) of a node.
string local-name(node-set[optional])
Optionally, a node-set. If no argument is specified, the function uses the context node.
A string with the local name of the context node, if no argument is specified, the local name of the first node if a node-set is specified, or an empty string if an empty node-set is given. Root, text, and comment nodes are empty by definition.
Defined: XPath, section 4.1.
