| 摘要 |
<p>An exemplary search system parses a received query into one or more sub-queries, with each parsed sub-query including one or more search operators. The system then processes the sub-queries against one or more databases to produce corresponding sub-query result sets, with each set including a list of documents. The sub-query results sets are then combined based on the one or more search operators to produce a query result set for the received query, with the query result set identifying at least one virtual document, the virtual document comprising one or more sub-documents. The one virtual document is presented to a query generator as a unified document.</p> |
