RESEARCH ON THE QUERY AGENT BASED ON THE MODEL AND METHOD METADATA

The metadata standard of data in Geography Information System (GIS) has been created, and plays an important role in data’s organization and management, but for the Model and Method Metadata, which is very important to the usage of these method, has not been described in details, thus it is very difficult to query and index the existing models and mathematics methods in existence. With the research to the GIS, we put forward a set of metadata database architecture that is suit to the GIS and other information systems which have relationship with geographic data, so that it can be used to realize the efficient management of the models and methods. In this paper, we also have some discuss on the Agent-based architecture of the Model and Method Metadata services, put forward the prototype of the metadata Query Agent which will quickly query in the extraordinary big metadata database. Finally it draws a conclusion that it is feasible to realize the Query Agent based on the Model and Method Metadata, and it will be very efficient to find the models and methods with Query Agent in GIS.