Architecture

Source

discovery

Source

Repository

Server/Source

Selection

...

Relevant servers

Source

analysis

Internet

• Strict Matching

• Term expansion

• Query matching

• Category matching

• Schema matching

• Capability matching

• Capability decomposition

• IQ ranking

• Incremental refinement

• Runtime plan refinement

• Subplan executionlocation

• QBE

• Domain search

Query Tree

Refined

Query Tree

Dynamic rerouting

Query Routing Plan

Domain

Modules

Query

Refinement

Interactive

execution update

Query

& Search

Engine

Execution

Monitoring

Query

Interface

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