A Metadata Repository API
نویسندگان
چکیده
The Internet provides users with a wealth of data. Much of this data is maintained in passive data sources, that is sources which do not provide facilities to search and query the information. In this paper we describe an approach to querying passive data sources based on the extraction and exploitation of metadata from the data sources. We describe two situations where this approach has been used successfully. The main focus of the paper is on the metadata repository API. We describe the requirements for the repository and show how these influence the API design. We then describe the typical use of the API and explain how it differs from other standard knowledge base APIs. 1
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