Method and structure for federated web service discovery search over multiple registries with result aggregation

摘要

A method (and structure) of querying one or more Web-based data sources, includes receiving a compound query statement having at least one first-level query and at least one aggregation operator. An aggregation operator is determined which applies to each first-level query. Each aggregation operator can be either explicit or implicit. An implicit aggregation operator is an aggregation operator defining a default aggregate operation if no explicit aggregation operator is present.