An integrated retrieval scheme retrieves data involved in a plurality of semi-structured documents scattering over open networks and collects the required information item by item from the semi-structured documents through a unified interface without regard to differences in the document structures,...http://www.google.com.hk/patents/US6424980?utm_source=gb-gplus-share專利 US6424980 - Integrated retrieval scheme for retrieving semi-structured documents
