Product Flow Model information that supports the WITSML standard. The WITSML API mandated plural root element which allows multiple singular objects to be sent. The plural name is formed by adding an "s" to the singular name. Information about the XML message instance. Information about a single Product Flow Model. Data object schema version. The fourth level must match the version of the schema constraints (enumerations and XML loader files) that are assumed by the documenti nstance. The name of the Product Flow Model. The non-contextual elements for general Product Flow Model information. A container element that contains elements that are common to all data objects. A container element that can contain custom or user defined data elements. Unique identifier for the Product Flow Model.