Enterprise or part of an enterprise that is situated in a single location and in which only a single (non-ancillary) productive activity is carried out or in which the principal productive activity accounts for most of the value added.
United Nations (2002), International Standard Industrial Classification of All Economic Activities: Revision 3.1) (ISIC Rev. 3.1), §58. United Nations (2008), International Standard Industrial Classification of All Economic Activities: Revision 4) (ISIC Rev. 4), §80. OECD and Eurostat (2005), Oslo Manual: Guidelines for Collecting and Interpreting Innovation Data, §242.