Section 6: Rules and References
HL7 Version 3 Standard: Common Message Element Types
CMETs (Common Model Element Types) are a work product produced by a particular work group for expressing a common, useful and reusable concept. They are generally "consumed", or used by both the producing and other work groups. CMETs are standardized model fragments intended to be building blocks that individual content domains can "include" in their designs. These blocks reduce the effort to produce a domain-specific design and assure that similar content across multiple domains is consistently represented.
Because they are intended for common use across models produced by all work groups, they are proposed to, reviewed by, and maintained by a CMET task force of the MnM committee. The CMET task force harmonizes and becomes steward for all CMETs.
HL7 Version 3 Standard: Common Message Element Types may also go by the following names or acronyms:
- Clinical and Public Health Laboratories
- Emergency Services
- Healthcare Institutions (hospitals, long term care, home care, mental health)
- Local and State Departments of Health
- Clinical Decision Support Systems Vendors
- Healthcare IT Vendors
- Pharmaceutical Vendors
- Lab Vendors
- National Health Information Exchange Infrastructures
- Enhances and is a foundation for the implementation of Version 3 models used in messages and documents
- Assures that similar content across multiple domains is consistently represented
- Enables V3 messaging by providing a consistent representation of common data constructs
- CMETS have been used in several normative HL7 specifications and are in use in the United Kingdom, Canada and the Netherlands
A CMET can be envisioned as a message type fragment that is reusable by other message types. Any message type can reference a CMET, including other CMETs. As an example, several work groups may require the use of a common concept, that of a person in the role of a patient. A CMET can be defined to express this concept as a message type that clones a role played by a person, with all appropriate attributes. The CMET is then used to uniformly represent the concept for all interested work groups.
CMETs are a work product produced by a particular work group for expressing a common, useful and reusable concept. They are generally "consumed," or used by both the producing work group and other work groups.
As of January 2010, CMETs are now balloted at the topic level by the individual work groups responsible for those topics. All CMETs that pass membership ballot during the Normative Edition year will become part of that normative edition, as an incremental update to the standard.
RESPONSIBLE WORK GROUPS
CMETs created in the Pharmacy Domain address key constructs such as Medication Order, Substance Administration and Detected Medication Issue.