This module is an extension to the Math::Symbolic module. A basic familiarity with that module is required. The Math::Symbolic::Custom::Pattern module implements pattern matching routines on Math::Symbolic trees. The patterns itself are constructed from Math::Symbolic trees with just a few variables which have a special meaning. The module provides two interfaces. You can use the new() and match() methods this class provides, or you can use the to_pattern() and is_of_form() methods on any Math::Symbolic tree. (Exported by the Math::Symbolic::Custom::Pattern::Export module. Refer to that module for details on is_of_form().) WWW: http://search.cpan.org/dist/Math-Symbolic-Custom-Pattern/