| Interface | Description | 
|---|---|
| DocumentTraversal | DocumentTraversalcontains methods that createNodeIteratorsandTreeWalkersto traverse a 
 node and its children in document order (depth first, pre-order 
 traversal, which is equivalent to the order in which the start tags occur 
 in the text representation of the document). | 
| NodeFilter | Filters are objects that know how to "filter out" nodes. | 
| NodeIterator | NodeIteratorsare used to step through a set of nodes, e.g. | 
| TreeWalker | TreeWalkerobjects are used to navigate a document tree or 
 subtree using the view of the document defined by theirwhatToShowflags and filter (if any). | 
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