# Context and Scope

# Business Context

Query Service business context diagram

Neighbour	Description
Repository	The source of data that can be queried

The query service is made up of a set of components, which all surround a core Blazegraph powered SPARQL backend.

The components can be deployed in multiple configurations.

Query Service technical context diagram

Component	Description
User Interfaces	User interfaces for interacting with the query service
Backend	Main triple storage and SPARQL API access
Updating	Components to keep the Backend up to date with changes from a Wikibase Repository