From DouglasP blog (emphasis mine):
The components of the SQL Server Modeling CTP are:
- "M" is a highly productive, developer friendly, textual language for defining schemas, queries, values, functions and DSLs for SQL Server databases
- "Quadrant" is a customizable tool for interacting with large datasets stored in SQL Server databases
- "Repository" is a SQL Server role for the the secure sharing of models between applications and systems
We will announce the official names for these components as we land them, but the key thing is that all of these components are now part of SQL Server and will ship with a future release of that product.