| AbstractLoader | Base loader for validation metadata. |
| AnnotationLoader | Loads validation metadata using a Doctrine annotation {@link Reader}. |
| FileLoader | Base loader for loading validation metadata from a file. |
| FilesLoader | Base loader for loading validation metadata from a list of files. |
| LoaderChain | Loads validation metadata from multiple {@link LoaderInterface} instances. |
| StaticMethodLoader | Loads validation metadata by calling a static method on the loaded class. |
| XmlFileLoader | Loads validation metadata from an XML file. |
| XmlFilesLoader | Loads validation metadata from a list of XML files. |
| YamlFileLoader | Loads validation metadata from a YAML file. |
| YamlFilesLoader | Loads validation metadata from a list of YAML files. |