基于模式映射的GML文档存储

STORING GML DOCUMENTS BASED ON SCHEMA MAPPING

随着地理信息系统GIS(Geography Markup Language)的广泛应用,GML己经成为事实上的空间数据编码、传输、共享和发布的一种国际标准。近年来,大量GML数据以文档形式出现,对如何高效地存储和管理GML数据提出了新的挑战。根据GML文档的特点,提出了一种基于模式映射的存储方法。首先,根据映射规则将GML模式生成对象-关系数据库模式;其次,解析GML文档并根据映射信息构造相应的SQL语句,将数据存储于数据库。实验表明,提出的存储方法是可行、高效的。

With the wide use of GIS,GML has become the de facto international standard for spatial data encoding,transmitting,sharing and distributing.Recently,with large amounts of GML data appearing in form of the document,how to store and manage them efficiently is becoming a new challenge.In this paper,we propose a storage method based on schema mapping according to the feature of GML documents.Firstly,GML schema is mapped into object-relational database schema according to mapping rules;secondly,GML documents are parsed,corresponding SQL statements will be constructed according to mapping information,and the data is stored to database.Experimental result shows that the storage method brought forward in this paper is feasible and efficient.