BS EN IEC 61158-6-23:2019 Industrial communication networks. Fieldbus specifications Application layer protocol specification. Type 23 elements

Packets (data transmission)
Coding (data conversion)
Process control
Data transmission
Application layer (OSI)
Fieldbus
Communication networks
Industrial
Open systems interconnection
Communication procedures
Bus networks
Automatic control systems
Computer networks
Interfaces (data processing)

Link: BS EN IEC 61158-6-23:2019 Industrial communication networks. Fieldbus specifications Application layer protocol specification. Type 23 elements
Source: BSI Standards

BS EN IEC 61158-6-3:2019 Industrial communication networks. Fieldbus specifications Application layer protocol specification. Type 3 elements

Automatic control systems
Application layer (OSI)
Communication procedures
Interfaces (data processing)
Process control
Computer networks
Fieldbus
Communication networks
Data transmission
Bus networks
Open systems interconnection
Industrial

Link: BS EN IEC 61158-6-3:2019 Industrial communication networks. Fieldbus specifications Application layer protocol specification. Type 3 elements
Source: BSI Standards

The Weights and Measures Act 1985 (Amendment) and Units of Measurement Regulations 1986 (Amendment) Regulations 2019

These Regulations amend the Weights and Measures Act 1985 and the Units of Measurement Regulations 1986, both of which make provision for legal units of measurement for use in the United Kingdom. These Regulations partly implement Commission Directive 2019/1258 amending, for the purpose of its adaptation to technical progress, the Annex to Council Directive 80/181/EEC as regards the definitions of SI base units (OJ L 196, 24.7.2019, p. 6), which relates to the definition of units of measurement. The amendments in the Commission Directive update European law to reflect seven new definitions of expressions of measurement and indications of quantity of the International System of Units (SI) adopted by the General Conference on Weights and Measures at its 26th meeting which took place from 13th to 16th November 2018 (see The International System of Units (9th edition 2019) edited by the International Bureau of Weights and Measures, Pavillon de Breteuil, F-92312 Sèvres Cedex France, ISBN 978-92-822-2272-0). The amendments do not alter the value of those units of measurement, but substitute new definitions expressed in terms of natural constants.

Link: The Weights and Measures Act 1985 (Amendment) and Units of Measurement Regulations 1986 (Amendment) Regulations 2019
Source: Legislation .gov.uk