AtomĀ 

A normal character, a character class, or a parenthesized regular expression.

Syntax

atom :: = Char | charClass | ('(' regExp ')')

Remarks

The following table shows valid atoms R and the description for their set of strings L(R).

Valid atoms R for normal characters c, character classes C, and regular expressions S Set of strings L(R)

c

The single string consisting only of normal characters.

C

All strings in L(C).

(S)

All strings in L(S).

See Also

Reference

XML Schema Regular Expressions
XML Schema Regular Expressions Reference Chart
Character Classes
Normal Character

Concepts

Data Type Facets