# Rule structure reference
<a name="rule-reference"></a>

This section is a reference for rule configuration only. For a conceptual overview of the pipeline structure, see [CodePipeline pipeline structure reference](reference-pipeline-structure.md).

Each rule provider in CodePipeline uses a set of required and optional configuration fields in the pipeline structure. This section provides the following reference information by rule provider:
+ Valid values for the `RuleType` fields included in the pipeline structure rule block, such as `Owner` and `Provider`.
+ Descriptions and other reference information for the `Configuration` parameters (required and optional) included in the pipeline structure rule section.
+ Valid example JSON and YAML rule configuration fields.

Reference information is available for the following rule providers:

**Topics**
+ [CloudWatchAlarm](rule-reference-CloudWatchAlarm.md)
+ [CodeBuild rule](rule-reference-CodeBuild.md)
+ [Commands](rule-reference-Commands.md)
+ [DeploymentWindow](rule-reference-DeploymentWindow.md)
+ [LambdaInvoke](rule-reference-LambdaInvoke.md)
+ [VariableCheck](rule-reference-VariableCheck.md)