variable;variable_name;meausurement_unit;allowed_values;description
year;Publication year;integer;1985-2018;Year when the journal article(s) was(were) published, from Lattes Platform
title;Journal title;character;NA;From the Lattes Platform, ROAD, SeCS and/or NLM Catalog
nlmid;NLM id;character;NA;Value of the NlmUniqueID tag from the NLM Catalog
pissn;Print ISSN;character;NA;Value of the ISSN tag from the NLM Catalog, with IssnType equal to Print and with ValidYN set to Y
eissn;Electronic ISSN;character;NA;Value of the ISSN tag from the NLM Catalog, with IssnType equal to Electronic and with ValidYN set to Y
lissn;Linking ISSN;character;NA;Value of the ISSNLinking tag from the NLM Catalog
country;Publication country;character;NA;Value of the Country tag, within tag PublicationInfo, from the NLM Catalog
major_list;Major subjects;character;NA;Derived from MeshHeadingList from the NLM Catalog
n;Frequency;integer;NA;Number of articles in this year in this journal