The Oslo Modeling Language (commonly referred to as M) is a language for defining domain models and languages (the latter are often referred to as textual DSLs)... » 

The Oslo Modeling Language (commonly referred to as M) is a language for defining domain models and languages (the latter are often referred to as textual DSLs). M was created to allow developers to efficiently capture their intention in a form that is natural to author but also efficient to store and query using off-the-shelf database technology.

This book comes from the original creators of M--David Langworthy, Brad Lovering, and Don Box--and is the definitive reference to the language. If you are looking for a compact textual notation for writing down information or schematizing structured and unstructured data, this book is for you.

This book is the authoritative specification of the M language (draft) and describes the syntax and underlying model of the language. Highlights of this book include:An Introduction to domain modeling constructsAn Introduction to constructs for building textual DSLsComplete syntax for the languageDefinition of the M type system and data modelGlossary of terms «