Root element. This section contains common service metadata that provides a minimal, human-readable, description of the service. This section contains a WSDL description of the operations the service supports. This element is a container for any service specific metadata. For example, a wfsFeatureList, a wmsLayerList or ISO19115 can be plugged into this section. This section can contain any schemas that describe additional capabilities. The most obvious example is the filter capability schema.