This file defines the root library type and element. VersionedIdentifier is composed of three parts: (1) an optional system, or namespace, which provides a globally unique, stable scope for the identifier, (2) an identifier which identifies the set of all versions of a given resource, and (3) the actual version of the instance of interest in this set. The VersionedIdentifier therefore points to an individual 'versioned' instance of a resource such as the third version of a library. Defines a data model that is available within the artifact. The URI of the model that is being referenced. This URL must also be defined as a namespace in the root element of the document to allow for elements of the model to be referenced within the artifact. Includes a library for use within the artifact. A unique name within this artifact for the library reference. This name is used within this artifact to reference components of this library. Defines the type of the library. If this attribute is omitted, the library is assumed to be an ELM library artifact. Defines the path to the library. Optionally defines the required version number of the referenced library. The ContextDef type defines a context definition statement. Note that this is a placeholder for the context statement within the library. The effect of the context definition is applied by the translator to the definitions that follow. library represents a serialized library of CQL-Epression Logic Model. A Library is an instance of a CQL-ELM library. The identifier element defines a unique identifier for this library, and optionally, a system (or namespace) and version. This is the identifier of the XML schema (and its version) which governs the structure of this Library. Set of data models referenced in the Expression objects in this knowledge artifact. A reference to a data model that is used in the artifact, e..g., the Virtual Medical Record. Set of libraries referenced by this artifact. Components of referenced libraries may be used within this artifact. A reference to a library whose components can be used within the artifact. The parameters defined within this library. The code systems defined within this library. The value sets defined within this library. The codes defined within this library. The concepts defined within this library. The contexts defined within this library. The statements section contains the expression and function definitions for the library.