New GML Storage Schema Models for Spatial and Non-spatial Information

GML (Geographic Markup Language) is a markup language presented as exchange standard for geographic information by the OGC (Open GIS Consortium). In spatial network databases, studies on GML can be divided into parsing, storing and retrieval of GML documents. Among them, the storage of GML documents is essential for their efficient retrieval. However, there is little research on storing GML documents, whereas there have been a lot of research on the storing of XML documents. The storage schema models designed for XML documents are not appropriate for geographic information because they store duplicate data and need to search many tables for obtaining elements. In order to solve the problem, we, in this paper, propose new storage schema models for GML documents including spatial and non-spatial information. In addition, we implement a storage manager which can store GML documents by using our GML storage schema models.