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All published versions of Cochrane Reviews (including Protocols for Cochrane Reviews) are stored on the Cochrane central server, Archie. This also includes versions published before the launch of Archie in 2005–2006. The published versions stored in Archie cannot be deleted. Archie also contains versions of draft Cochrane Reviews that are not published.

Full access to the archive of all published Cochrane Reviews in Archie is available only to a few individuals in each Cochrane Group, such as Cochrane Review Groups (CRGs), as well as Archie ‘Super Users,’ and system and data administrators. This access to the archive can help CRG editorial teams answer queries about previously published versions that are not available in the public archive through the Cochrane Database of Systematic Reviews (CDSR) (see below). However, it is at the discretion of the CRG editorial teams as to whether they choose to provide copies of Cochrane Reviews to people who have asked for them.

The CDSR includes an archive of all citation versions of published Cochrane Reviews (including Protocols) starting from Issue 4, 2003 (www.cochranelibrary.com). Where previous versions of a Cochrane Review exist in the CDSR, these can be accessed via the ‘Other Versions’ link on each Cochrane Review.

Using the archive data for methodological purposes

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