Folder contains whole hierarchy of OMeta Grammars used by OMeta/Lua implementation itself.

Grammars are divided and written in such a way that:

• each Grammar can be used independently as much as possible;
• each Grammar has some level of abstraction - e.g.: Grammar may be independent of Lua types, may be specific to some specific kind of input stream, Grammar can "produce" only values of primitive types or abstract syntax trees;
• depending on his needs user selects, "requires" and merges specific Grammars in a detailed way - e.g.: other Grammars should be composed if user need to parse binary file where words are encoded in Big Endian and bits in bitfields are ordered most significant bit first (MSB0) and other Grammars are needed when user writes Lua syntax extension;