FRMG stands for FRench MetaGrammar and is primarily a wide coverage grammatical description for French.

Metagrammars could theoretically be directed used to parse sentences. However, they are mostly designed to ease the work of syntacticians to describe grammatical phenomena using elementary constraints and a modular organization. In practice, metagrammars are used to derive an operational grammar. For FRMG, it is a Tree Adjoining Grammar (TAG).

The grammar is then compiled into a chart-like parser and may then be used to parse.