Paper: Priority Union And Generalization In Discourse Grammars

ACL ID P94-1003
Title Priority Union And Generalization In Discourse Grammars
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 1994
Authors

We describe an implementation in Carpenter's ty- ped feature formalism, ALE, of a discourse gram- mar of the kind proposed by Scha, Polanyi, et al. We examine their method for resolving parallelism-dependent anaphora and show that there is a coherent feature-structural rendition of this type of grammar which uses the operations of prwrity union and generalization. We describe an augmentation of the ALE system to encompass these operations and we show that an appropriate choice of definition for priority union gives the de- sired multiple output for examples of vP-ellipsis which exhibit a strict/sloppy ambiguity. 1 Discourse Grammar Working broadly within the sign-based paradigm exemplified by HPSG (Pollard and Sag in press) we have been exploring computational issues for a discourse level ...