The Resource Identification Initiative (RII) aims to promote research resource identification, discovery, and reuse. The RII introduced the concept of Research Resource Identifiers (RRIDs) - persistent and unique identifiers for referencing a research resource. A critical goal of the RII is the widespread adoption of RRIDs to cite biological resources such as antibodies, cell lines, organisms or tools in the biomedical literature and other places that reference their generation or use.
RRIDs use established community identifiers where they exist. To ensure they are recognizable, unique, and traceable, identifiers are prefixed with "RRID:", followed by a second tag that indicates the source authority that provided it (e.g. "AB" for the Antibody Registry, "CVCL" for the Cellosaurus, "MGI" for Mouse Genome Informatics, "SCR" for the SciCrunch Registry).
Cell Line: RRID:CVCL_0033
For more information on the initiative see:
Bandrowski A, Brush M, Grethe JS et al. The Resource Identification Initiative: A cultural shift in publishing. F1000Research 2015, 4:134