“Faculty of Computer Science & Information Systems

摘要: A Spatio-temporal data model and query language for biodiversity is growing importance to the biodiversity data management, forest and environment control Spatio-temporal data model and query language have received much attention in the database research community because of their practical importance and interesting challenges they pose. This paper discusses about spatio-temporal information, query language and problems with existing models. In this paper our main objective to minimice the extension required in SQL language. This paper also focuses on the unified models of space and time using object-relation approach. In particular, we propose a conceptual objectrelational spatial temporal data model based on Donna J. Peuquet's pyramid framework. Spatiotemporal queries are expressed by user defined aggregates, such as duration and during temporal relationships. Therefore, query language …