# QMS Architecture

QMS uses the Autonomy Content Infrastructure (ACI) Client API to communicate with custom applications that retrieve data by using HTTP commands. QMS communicates over HTTP by using XML, and can adhere to SOAP.

Query Manipulation Server architecture

When you use QMS, you send queries to QMS rather than directly to IDOL Server. QMS forwards the queries to IDOL Server and the Promotion Agentstore component, which contains the QMS rules.

The Promotion Agentstore returns any rules that apply to the current query. QMS can then perform one of the following actions:

- modify the current query. For example, QMS can expand the query text with a list of synonyms before it sends the query to IDOL Server.

- modify the result. For example, QMS can insert a document at a particular position in the set of results returned by IDOL Server.

QMS can do either, both, or none of these actions depending on the configuration and the particular query. You can also query for promotions.

QMS can accept HTTP requests sent from a Web browser.

Related Topics

- Send Actions to Query Manipulation Server

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