tech,6-1-E93-1004,ak | In this paper we introduce a <term> modal language LT </term> for imposing <term> constraints </term> on <term> trees </term> , and an extension LT ( LF ) for imposing <term> constraints </term> on <term> trees </term> decorated with <term> feature structures </term> . | #24653 In this paper we introduce amodal language LT for imposing constraints on trees, and an extension LT (LF) for imposing constraints on trees decorated with feature structures. |