XPath: Navigating XML with XPath 1.0 and 2.0 Kick Start

Chapter 8. XPath 2.0 Expressions and Operators

IN THIS CHAPTER

• Creating Primary Expressions

• Creating Arithmetic Expressions

• Creating Path Expressions

• Creating Sequence Expressions

• Creating Comparison Expressions

• Creating Logical Expressions

• Creating for Expressions

• Creating Conditional Expressions

• Creating Quantified Expressions

• Creating Expressions That Work on Types

• In Brief

Creating Primary Expressions

The most basic expression type is the primary expression type. This type can be one of these:

• A literal

• A variable

• A function call

• A context item

• A parenthesized expression, which is used to control precedence of operators

• A comment

To understand these in detail, we'll take a look at them one by one.

Literals

A literal is just a value that is of an atomic type. As ...