Character Classes 

A character class is an atom that identifies a set of characters. The set of strings denoted by a character class contains one single character string for each character in the set of characters.

The following are character classes.

• Character Class

• Character Class Expression

• Character Group

• Positive Character Group

• Negative Character Group

• Character Class Subtraction

• Character Range

See Also

Reference

XML Schema Regular Expressions
XML Schema Regular Expressions Reference Chart
Atom

Concepts

Data Type Facets