��ѧG4 I ϵͳ������ѧ��( ����ѧ������ѧ������ѧ����������ѧ) ��ѧ���ݼ���Ϊ���������д�����߿����Դ����Ϊ����Ŀ��ļ����ϵͳ�����ڿ�ѧ�Ƶ�ѧ�ռ����ݼ����漰���ڶ༼�������пռ�Ԫ���ݵ�������Ӧ�ù��ɱ�ϵͳ����Ҫ��ɲ��֡����߾�Ԫ���ݵĸ��Ԫ�����ڱ�ϵͳ�еľ������ݡ����á���׼���о���״�Ƚ���̽�֣�����Ա�ϵͳ���Ԫ���ݹ�����ϵͳ����ƿ�ܡ�

The geological G4 I system is a computer system targeted on medium or large scale mineral resource evaluation based on data integration of four disciplines ( geology��geography��geochemistry and geophysics) �� Interdisciplinary geological spatial data integration involves many techniques��in which the content and application of spatial metadata form the important part of the system�� The authors discuss the concept of metadata and the specific content��role��standards and current status of the research in this system��and propose the design framework of metadata management subsystem for the system��