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# Combine Engine Configuration Parameters

The Combine ESP engine identifies related events in different tracks and creates an output track where the information from both tracks is combined into a single output record.

This engine differs from the And engine because:

- It produces a single output record for each record in the first input track, and this output record contains copies of all related records from the second input track. In comparison, the And engine creates one output record for each pair of related records.
- Every record from the first input track will appear in the output, even if there are no related records in the second input track.

Configuration Parameter | Description
--- | ---
Input0 | The first input track.
Input1 | The second input track.
LuaScript | The path of a Lua script that defines conditions that a record pair must meet in order to be included in the output track.
MaxTimeInterval | The maximum interval from a record in the first track to a record in the second track, for the two records to be considered a pair.
MinTimeInterval | The minimum interval from a record in the first track to a record in the second track, for the two records to be considered a pair.
Type | The type of ESP engine to use. Set this parameter to `Combine`.

## Output Tracks

This engine produces a single output track, named `TaskName.Output`.

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