Database Programming Languages 6th International Workshop, DBPL-6, Estes Park, Colorado, USA, August 18-20, 1997

This book constitutes the thoroughly refereed post-workshop proceedings of the 6th International Workshop on Database Programming Languages, DBPL-6, held in Estes Park, Colorado, USA, in August 1997. The 20 revised full papers presented have gone through two rounds of reviewing and selection. Also included are two invited talks, the transcription of a panel discussion and an introductory survey by the volume editors. The papers address all current aspects of database programming languages, in particular spatial databases, typing, query languages for new applications, views, expressive power, aggregate queries, cooperative work, and transactions.

Euclid, Tarski, and Engeler encompassed.- Functional programming: An angry half-dozen.- Panel session: Metadata for database interoperation.- dedale, a spatial constraint database.- Degrees of monotonicity of spatial transformations.- Constrained matching is type safe.- Existentially quantified procedures: A mechanism for abstracting type in dynamic typing constructs.- Querying sequence databases with transducers.- A structure-based approach to querying semi-structured data.- VQL: A query language for multiversion databases.- Object views and database restructuring.- Implementing incremental view maintenance in nested data models.- Incremental recomputation of recursive queries with nested sets and aggregate functions.- Towards a language for the fully generic queries.- On the power of aggregation in relational query languages.- Datalog and description logics: Expressive power.- Formal foundations for optimising aggregation functions in database programming languages.- Querying multidimensional databases.- Integrating organisational and transactional aspects of cooperative activities.- Business conversations: A high-level system model for agent coordination.- Transaction datalog: A compositional language for transaction programming.- Automatic verification of transactions on an object-oriented database.- Static analysis of transactions for conservative multigranularity locking.