Proxy types that carry dictionary metadata and extend miscellaneous unit of measurement codes from the United Nations Economic Commission for Europe Recommendation No. 20, "Codes for Units of Measure used in International Trade". Miscellaneous unit of measurement code from the United Nations Economic Commission for Europe Recommendation No. 20, "Codes for Units of Measure used in International Trade". The Global Justice XML Data Model. The appinfo for the schemas A proxy code list that enumerates units of measurements for a length value. A proxy code list that enumerates units of measurement for a weight value. A proxy code list that enumerates units of time. A proxy code list that enumerates units of measurement for a speed or velocity.