Import NodeFilter from DOM2 Traversal/Range.

Lib/xml/dom/NodeFilter.py

+# This is the Python mapping for interface NodeFilter from
+# DOM2-Traversal-Range. It contains only constants.
+
+class NodeFilter:
+    """
+    This is the DOM2 NodeFilter interface. It contains only constants.
+    """
+    FILTER_ACCEPT = 1
+    FILTER_REJECT = 2
+    FILTER_SKIP   = 3
+
+    SHOW_ALL                    = 0xFFFFFFFFL
+    SHOW_ELEMENT                = 0x00000001
+    SHOW_ATTRIBUTE              = 0x00000002
+    SHOW_TEXT                   = 0x00000004
+    SHOW_CDATA_SECTION          = 0x00000008
+    SHOW_ENTITY_REFERENCE       = 0x00000010
+    SHOW_ENTITY                 = 0x00000020
+    SHOW_PROCESSING_INSTRUCTION = 0x00000040
+    SHOW_COMMENT                = 0x00000080
+    SHOW_DOCUMENT               = 0x00000100
+    SHOW_DOCUMENT_TYPE          = 0x00000200
+    SHOW_DOCUMENT_FRAGMENT      = 0x00000400
+    SHOW_NOTATION               = 0x00000800
+
+    def acceptNode(self, node):
+        raise NotImplementedError