The ShearerLoaderType and ShearerLoaderDrumType are subtypes of the MiningEquipmentType defined in OPC 40560 and represent components of a Shearer Loader machine as part of a longwall shearer system. Importantly, the Shearer Loader machine is composed of one instance of the ShearerLoaderType, acting as a container type, and one or more instances of the ShearerLoaderDrumType, which are understood to be subcomponents of the container type. Figure 1 shows the hierarchical and compositional structure of the AddressSpace of these ObjectTypes.
