XPath Kick Start: Navigating XML with XPath 1.0 and 2.0

There are four data types in XPath 1.0:

• Numbers

• Strings

• Booleans

• Node-sets

These node types are supported in XPath 1.0:

• The root node

• Element nodes

• Attribute nodes

• Processing instruction nodes

• Comment nodes

• Text nodes

• Namespace nodes

Here are some additional concepts from this chapter:

• Document order is the order of nodes as they appear in the original document.

• Documents are handled by XML processors as node trees.

• Infosets hold the data that an XML document contains in standard form.