| 摘要 |
A system and method for storing and providing metadata. Metadata may be retrieved from multiple sources. The metadata is stored in facets in a repository and tagged to indicate one or more of the source, a time frame, or an associated data object. In response to receiving a request for metadata, a system selects metadata based on the specified object, source, or time frame. Access permissions corresponding to the requester are used to select and provide metadata for which the requester has permissions. |
| 主权项 |
1. A computer-based method of storing and providing metadata items corresponding to a plurality of data objects, the method comprising:
a) receiving, from each of a plurality of sources, a corresponding set of metadata items, each metadata item of the set of metadata items corresponding to one or more data objects of the plurality of data objects; b) storing each metadata item as a facet in a repository; c) tagging each facet with an identifier of a source corresponding to the facet, an identifier of a time frame corresponding to the facet, and a data object corresponding to the facet, wherein at least two facets corresponding to a data object have different corresponding time frames from each other; d) receiving, from a requester, a request for metadata, the request including a specification of a requested time frame representative of a time, prior to the request, that the metadata was received, retrieved, or extracted; e) in response to receiving the request, providing first metadata stored as a facet corresponding to a time frame that matches the requested time frame, and not providing second metadata stored as a facet corresponding to a time frame that does not match the requested time frame; and f) in response to receiving the request, selectively providing the requested metadata to the requester based on whether access permissions corresponding to the requester indicate that the requester has permissions corresponding to the specified time frame. |
