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# Enterprise Information System (EIS) Interactions

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To invoke a query through a J2EE Connector Architecture (J2C) adapter to a remote EIS, you use an `EISInteraction`, an instance of `Call`. TopLink supports the following `EISInteraction` types:

- IndexedInteraction

- MappedInteraction

- XMLInteraction

- XQueryInteraction

- QueryStringInteraction

In each of these interactions, you specify a functional interface (similar to a stored procedure) that identifies the function to invoke on the EIS. This functional interface contains the following:

- The function name

- The record name (if different than the function name)

- A list of input arguments

- A list of output arguments

For more information, see the following:

- "EIS Projects"

- "Using EIS Interactions"