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Required Data Elements in MedlineCitationSet

MEDLINE®/PubMed® records in all MedlineCitation statuses distributed to licensees (except as noted below) contain the following data elements:

MedlineCitation (with its Owner and Status attributes)
PMID (with its Version attribute)
DateCreated (includes Year, Month, Day)
DateCompleted (not on In-Data-Review and In-Process status records; includes Year, Month, Day on MEDLINE, OLDMEDLINE, and PubMed-not-MEDLINE status records)
Article (with its PubModel attribute)
     ISSN (with its IssnType attribute; may not reside on a small number of older records)
     PubDate (includes at least Year)
     MedlinePgn (see Pagination) or ELocationID (with its EIdType and ValidYN attributes)
     PublicationType (see PublicationTypeList)
CitationSubset (not on PubMed-not-MEDLINE status records)