= Spring Data Commons Reference Guide The reference documentation consists of the following sections: [horizontal] link:preface.html[Preface] :: Project metadata (version control, bug tracker, and so on). link:dependencies.html[Dependencies] :: Dependency Management with Spring Boot, Spring Framework. link:repositories.html[Repositories] :: Core concepts, defining queries, repository interfaces, and more. link:repository-projections.html[Projections] :: Interface-based projections, class-based projections, dynamic projections. link:query-by-example.html[Query by Example] :: Usage, `Example`, `ExampleMatcher`. link:auditing.html[Auditing] :: Annotation-based auditing metadata, interface-based auditing metadata, `AuditorAware`.