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Serial Item and Contribution Identifier


The Serial Item and Contribution Identifier (SICI) is a code (ANSI/NISO standard Z39.56) used to uniquely identify specific volumes, articles or other identifiable parts of a serial. It is "intended primarily for use by those members of the bibliographic community involved in the use or management of serial titles and their contributions".

It is an extension of the International Standard Serial Number, which identifies an entire serial (similar to the way an ISBN number identifies a specific book). The ISSN applies to the entire publication, however, including every volume ever printed, so this more specific identifier was developed by the Serials Industry Systems Advisory Committee (SISAC) to allow references to specific parts of a journal.

The variable-length, free of charge, code is compatible with other identifiers, such as DOI, PII and URN. Prior to January 2009, SICIs were valid DOI suffixes for registration at the CrossRef registration agency. However, to accommodate a security problem with Microsoft's Internet Explorer, they decided that they would soon refuse to register DOI suffixes that contain the colon character .

The SICI is a recognized international standard and is in wide use by publishers and the bibliographic community, primarily as an aid to finding existing articles or issues.JSTOR adopted SICIs in 2001 as its primary article-level identifier and the core of its stable and citation-derivable URLs. SICI was selected over simpler alternatives because of its ability to encompass the many varieties of journal metadata found in JSTOR's archive. However, due to difficulties encountered by its partners in calculating the correct values for the title code and the check digit, JSTOR's implementation of the standard ignores those elements. JSTOR now recommends against using SICI, and instead strongly suggests using DOIs instead. This is also done because sometimes multiple articles on the same page have the exact same name (in particular "Obituary").


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