A guide has been produced specifying the principles for determining the use of units in the digital transmission of machine-readable data. For the first time, in conjunction with the globally established SI, measures are defined which are essential for the simple, secure, harmonised and unambiguous exchange of metrological data. The handling of non-SI units and the requirements for conversion between SI and non-SI quantities are considered. In addition, a classification for the suitability of metrological data for interoperability and machine readability is made (medal system). The classification results from the use of SI units as defined in the 9th edition of BIPM's SI brochure. This document is deliverable D1 of the EURAMET EMPIR project 17IND02 (SmartCom, WP1).
Published at https://doi.org/10.5281/zenodo.3522631