Classification by function in the Statistical Business Register (SBR), v2:2007
Classification by function is replaced from January 1st 2013 by Sector Codes, in accordance with ESA 2010 (European System of Accounts), where the sector location is primarily determined by who has organizational control over the unit.
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/esr-sektor?id=04bfdd19-6ed7-45c6-ae90-ff59750efce0