# Data Dictionary

Most tables are derived from the MEDLINE XML files, parsed according to the MEDLINE®PubMed® XML Element Descriptions and their Attributes. The `source` column indicates the corresponding element in the MEDLINE XML. All elements other than those for the pmid_status table and the citation table are nested within the PubmedArticle element. “attr” indicates a named attribute in the XML, and “int position” indicates an integer to index each item in a list. The citation table is derived from the NIH Open Citation Collection.

table_name | field_name | source
--- | --- | ---
abstract | pmid | PMID
abstract | text | Abstract / AbstractText
abstract | label | Abstract / AbstractText / attr Label
abstract | nlm_category | Abstract / AbstractText / attr NlmCategory
abstract | abstract_pos | Abstract / AbstractText / int position
abstract_copyright | pmid | PMID
abstract_copyright | copyright | Abstract / CopyrightInformation
article | pmid | PMID
article | title | Article / ArticleTitle
article | language | Article / Language
article | vernacular_title | Article / VernacularTitle
article | pub_model | Article / attr PubModel
article | pub_date | Article / ArticleDate / Year-Month-Day
article_id | pmid | PMID
article_id | id_type | ArticleIdList / ArticleId / attr IdType
article_id | id_value | ArticleIdList / ArticleId
author | pmid | PMID
author | author_pos | AuthorList / Author / int position
author | last_name | AuthorList / Author / LastName
author | fore_name | AuthorList / Author / ForeName
author | initials | AuthorList / Author / Initials
author | suffix | AuthorList / Author / Suffix
author | valid | AuthorList / Author / attr ValidYN
author | equal_contrib | AuthorList / Author / attr EqualContrib
author | collective_name | AuthorList / Author / CollectiveName
author_affiliation | pmid | PMID
author_affiliation | author_pos | AuthorList / Author / int position
author_affiliation | affiliation_pos | AuthorList / Author / AffiliationInfo / Affiliation / int position
author_affiliation | affiliation | AuthorList / Author / AffiliationInfo / Affiliation
author_affiliation_identifier | pmid | PMID
author_affiliation_identifier | author_pos | AuthorList / Author / int position
author_affiliation_identifier | affiliation_pos | AuthorList / Author / Affiliation / int position
author_affiliation_identifier | source | AuthorList / Author / AffiliationInfo / Identifier / attr Source
author_affiliation_identifier | identifier | AuthorList / Author / AffiliationInfo / Identifier
author_identifier | pmid | PMID
author_identifier | author_pos | AuthorList / Author / int position
author_identifier | source | AuthorList / Author / Identifier / attr Source
author_identifier | identifier | AuthorList / Author / Identifier
author_list | pmid | PMID
author_list | complete | AuthorList / attr CompleteYN
chemical | pmid | PMID
chemical | registry_number | ChemicalList / Chemical / RegistryNumber
chemical | substance_name | ChemicalList / Chemical / NameOfSubstance
chemical | substance_ui | ChemicalList / Chemical / NameOfSubstance / attr UI
citation | citing_pmid | NIH OCC / citing
citation | cited_pmid | NIH OCC / referenced
citation_version | md5_computed | -
citation_version | pmparser_version | -
citation_version | datetime_processed | -
comment | pmid | PMID
comment | ref_type | CommentsCorrectionsList / CommentsCorrections / attr RefType
comment | ref_pmid | CommentsCorrectionsList / CommentsCorrections / PMID
data_bank | pmid | PMID
data_bank | data_bank_name | DataBankList / DataBank / DataBankName
data_bank | accession_number | DataBankList / DataBank / AccessionNumber
grant_item | pmid | PMID
grant_item | grant_id | GrantList / Grant / GrantID
grant_item | acronym | GrantList / Grant / Acronym
grant_item | agency | GrantList / Grant / Agency
grant_item | country | GrantList / Grant / Country
grant_list | pmid | PMID
grant_list | complete | GrantList / CompleteYN
investigator | pmid | PMID
investigator | investigator_pos | InvestigatorList / Investigator / int position
investigator | last_name | InvestigatorList / Investigator / LastName
investigator | fore_name | InvestigatorList / Investigator / ForeName
investigator | initials | InvestigatorList / Investigator / Initials
investigator | suffix | InvestigatorList / Investigator / Suffix
investigator | valid | InvestigatorList / Investigator / attr ValidYN
investigator_affiliation | pmid | PMID
investigator_affiliation | investigator_pos | InvestigatorList / Investigator / int position
investigator_affiliation | affiliation_pos | InvestigatorList / Investigator / AffiliationInfo / Affiliation / int position
investigator_affiliation | affiliation | InvestigatorList / Investigator / AffiliationInfo / Affiliation
investigator_affiliation_identifier | pmid | PMID
investigator_affiliation_identifier | investigator_pos | InvestigatorList / Investigator / int position
investigator_affiliation_identifier | affiliation_pos | InvestigatorList / Investigator / Affiliation / int position
investigator_affiliation_identifier | source | InvestigatorList / Investigator / AffiliationInfo / Identifier / attr Source
investigator_affiliation_identifier | identifier | InvestigatorList / Investigator / AffiliationInfo / Identifier
investigator_identifier | pmid | PMID
investigator_identifier | investigator_pos | InvestigatorList / Investigator / int position
investigator_identifier | source | InvestigatorList / Investigator / Identifier / attr Source
investigator_identifier | identifier | InvestigatorList / Investigator / Identifier
journal | pmid | PMID
journal | journal_name | Journal / Title
journal | journal_iso | Journal / ISOAbbreviation
journal | pub_date | Journal / Year-Month-Day
journal | pub_year | Journal / Year
journal | pub_month | Journal / Month
journal | pub_day | Journal / Day
journal | medline_date | Journal / MedlineDate
journal | volume | Journal / Volume
journal | issue | Journal / Issue
journal | cited_medium | Journal / JournalIssue / attr CitedMedium
keyword_item | pmid | PMID
keyword_item | keyword_name | KeywordList / Keyword
keyword_item | major_topic | KeywordList / Keyword / attr MajorTopicYN
keyword_list | pmid | PMID
keyword_list | list_owner | KeywordList / attr Owner
mesh_descriptor | pmid | PMID
mesh_descriptor | descriptor_pos | MeshHeadingList / MeshHeading / int position
mesh_descriptor | descriptor_name | MeshHeadingList / MeshHeading / DescriptorName
mesh_descriptor | descriptor_ui | MeshHeadingList / MeshHeading / DescriptorName / attr UI
mesh_descriptor | descriptor_major_topic | MeshHeadingList / MeshHeading / DescriptorName / attr MajorTopicYN
mesh_list | pmid | PMID
mesh_list | indexing_method | MedlineCitation / IndexingMethod
mesh_qualifier | pmid | PMID
mesh_qualifier | descriptor_pos | MeshHeadingList / MeshHeading / int position
mesh_qualifier | qualifier_name | MeshHeadingList / MeshHeading / QualifiierName
mesh_qualifier | qualifier_ui | MeshHeadingList / MeshHeading / QualifiierName / attr UI
mesh_qualifier | qualifier_major_topic | MeshHeadingList / MeshHeading / QualifiierName / attr MajorTopicYN
other_abstract | pmid | PMID
other_abstract | text | OtherAbstract / AbstractText
other_abstract | type | OtherAbstract / attr Type
other_abstract | language | OtherAbstract / attr Language
other_id | pmid | PMID
other_id | source | OtherId / attr Source
other_id | id_value | OtherId
pmid_status | pmid | PMID
pmid_status | version | PMID / attr Version
pmid_status | xml_filename | -
pmid_status | status | DeleteCitation | (MedlineCitation / attr Status)
pub_history | pmid | PMID
pub_history | pub_status | History / PubMedPubDate / attr PubStatus
pub_history | pub_date | History / PubMedPubDate / Year-Month-Day
pub_type | pmid | PMID
pub_type | type_name | PublicationTypeList / PublicationType
pub_type | type_id | PublicationTypeList / PublicationType / attr UI
readme | text | https://ftp.ncbi.nlm.nih.gov/pubmed/baseline/README.txt
xml_processed | xml_filename | -
xml_processed | pmparser_version | -
xml_processed | datetime_processed | -