| 摘要 |
The metadata-based intermediation between two data sources. A computing system accesses a query message (e.g., a query or a query response). The query message is structured to be compatible with the first data source. The computing system uses metadata either directly, or indirectly through the execution of code referenced by the metadata to convert the query message into a semantically equivalent query message that is compatible with the second data source. If the query message were a query, then a query response may be acquired and the metadata may perhaps be used again to convert the query response into a form that is compatible with the first data source. In one embodiment, the conversion using the metadata is performed with the assistance of a framework, making changes to the conversion process as simple as perhaps just editing the metadata itself.
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