OMeta is an object-oriented language for pattern matching. It is based on a variant of Parsing Expression Grammars (PEGs) which we have extended to support matching on arbitrary data types. OMeta's general-purpose pattern matching facilities provide a natural and convenient way for programmers to implement tokenizers, parsers, visitors, and tree transformers, all of which can be extended in interesting ways using familiar object-oriented mechanisms.More information is availablehere.