ISSN International Centre and the Finnish National Library to present a discussion paper at MAC (MARC Advisory Committee) on 26 January 2022

This paper considers options for adding new subfields to the existing field 856 (Electronic Location and Access) in order to establish a subfield for persistent identifiers (PIDs): ARK, DOI, Handle and URN; also to allow separation of functional and dead URL addresses including valid and confirmed Web archive addresses for the latter. The paper also provides a place for indicating date ranges for relevant archived content. Finally, this paper explains the need for specifying file formats for archived content more precisely. This can be accomplished by making 856 $q repeatable.