A simple left part property for a set of grammatical trees is introduced. The class of left part grammars, a subclass of the class of context-free grammars, is defined. It is shown that the set of grammatical trees of a context-free grammar satisfies this left part property if and only if the context-free grammar is a left part grammar. Some properties of leftpart grammars are considered.
- HMI-SLT: Speech and Language Technology