Open Archival Information System

This reference model is defined by recommendation CCSDS 650.0-M-2-S of the Consultative Committee for Space Data Systems;[1] this text is identical to = 57284 ISO 14721:2012.

The CCSDS's purview is space agencies, but the OAIS model it developed has proved useful to other organizations and institutions with digital archiving needs.

OAIS, known as ISO 14721:2003, is widely accepted and utilized by various organizations and disciplines, both national and international, and was designed to ensure preservation.

The OAIS model can be applied to various archives, e.g., open access, closed, restricted, "dark", or proprietary.

There are six functional entities in an OAIS: Although originally developed by the Consultative Committee for Space Data Systems, a body dedicated to overseeing space agencies, as digital preservation has become a discipline unto itself, the OAIS has become the standard model for digital preservation systems at many institutions and organizations.

As part of #WeMissiPres, Frank Obermeit, a computer scientist at the State Archives of Saxony-Anhalt, Germany, presented[6] a software architecture model that fully implements the Open Archival Information System (OAIS) reference model on 22 September 2020.

The three main standards are Business Process Model and Notation (BPMN), Representational State Transfer (REST) and OpenID Connect (OIDC).