Allows to configure how is performed the iteration other the xml document.

An xml document could be considered as a tree structure, where the root document node is the root of the tree. This enumerator allows to configure how is visited each node of the tree.

Enumerator:
DEEP_ITERATION  Makes a deep iteration, visiting first childs of a visited node instead of brother nodes at the same level.
WIDE_ITERATION  Makes a wide iteration, visiting first all nodes for a given level, after visiting nodes for the next level.