Editing of NCI Thesaurus 13.08d was completed on August 26, 2013. Version 13.08d was August's fourth build in our development cycle. This directory contains files: ReadMe.txt This file Thesaurus_13.08d.FLAT.zip The NCI Thesaurus 13.08d in flat file format Thesaurus_13.08d.OWL.zip The NCI Thesaurus 13.08d in OWL Thesaurus_13.08d.OWL-byName.zip The NCI Thesaurus 13.08d in OWL byName format ThesaurusInf_13.08d.OWL.zip The NCI Thesaurus 13.08d in Inferred OWL Thesaurus_13.08d.LexGrid.zip The NCI Thesaurus 13.08d in LexGrid 5.1 XML The zip files unpack the following files: Thesaurus_13.08d.FLAT.zip Thesaurus.txt Thesaurus_13.08d.OWL.zip Thesaurus.owl Thesaurus_13.08d.OWL-byName.zip Thesaurus-byName.owl ThesaurusInf_13.08d.OWL.zip ThesaurusInferred.owl Thesaurus_13.08d.LexGrid.zip Thesaurus.xml In the first two formats below, the relations are as stated by the editors, no inferred relations are specified. The Thesaurus_13.08d.txt flat file is in tab-delimited format. Included in this format are all the terms associated with NCI Thesaurus concepts (names and synonyms), a text definition of the concept (if one is present), and stated parent-child relations, sufficient to reconstruct the hierarchy. The fields are: code concept name parents synonyms definition The "parents" field contains the concept name(s) of the superconcept(s). If a "parents" or "synonyms" field contains multiple entries, these are pipe-delimited. For root concepts without "parents", this field contains the string "root_node". The first entry in the "synonyms" field is the preferred name of the concept. If no preferred name has been stated for the concept, this field contains the concept name. The "definition" field contains only one definition if more than one definition is associated with the concept; not all concepts contain definitions. The Thesaurus.owl file packaged in Thesaurus_13.08d.OWL.zip (asserted OWL byCode) contains the entire terminology expressed in the Web Ontology Language (OWL), and the rdf:about (rdf:ID) utilizes semantically meaningless identifiers, e.g. "C123456", which is the value of the "code" property found in the asserted "byName" file. Relations are as stated by the editors; no inferred relations are specified. Annotations of use only to the EVS (for example, editor's notes) are absent in the released terminology. The rdf:about of annotation and object properties are also replaced with their corresponding codes. The Thesaurus-byName.owl file packaged in Thesaurus_13.08d.OWL-byName.zip (asserted OWL byName) contains the entire terminology expressed in the OWL web ontology language (http://www.w3.org/TR/owl-ref/), and the rdf:about (rdf:ID) utilizes semantically meaningful identifiers, e.g. "Gene". Relations are as stated by the editors; no inferred relations are specified. Annotations of use only to the EVS (for example, editor's notes) are absent in the released terminology. The unzipped Thesaurus.owl is available directly at http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl The ThesaurusInferred.owl file packaged in ThesaurusInf_13.08d.OWL.zip contains the terminology from the NCI Thesaurus but excludes retired concepts and includes inferred relationships. This file is created for import into the UMLS and NCI Metathesaurus. Properties of use only to the EVS (e.g. editor notes) are absent in the released terminology. It also uses semantically meaningless rdf:about identifiers as described above for "asserted OWL byCode". The Thesaurus.xml file packaged in Thesaurus_13.08d.LexGrid.zip contains the entire terminology in the LexGrid XML format. For more information about LexGrid XML, please see the Vocabulary Knowledge Center (https://cabig-kc.nci.nih.gov/Vocab/KC/index.php/LexGrid_Model_and_Schema). The file nci_code_cui_map_201306.dat contains the map of NCI Thesaurus (NCIt) codes to NCI Metathesaurus (NCIMeta) CUIs (concept unique identifier). The format of the file is code CUI . The CUIs are either derived from the UMLS Metathesaurus (CUIs that begin with "C-digit") or specific to the NCI Metathesaurus (CUIs that begin with "CL"). This mapping file is created for each release of the NCIMeta, which is published on a quarterly schedule hence is not current with every release of NCIt which is published monthly. Newly created Thesaurus concepts will not appear in this file until the next release of the Metathesaurus, and newly retired Thesaurus concepts will continue to appear until the next release of the Metathesaurus. Archived mapping files may be found in the archives directory beneath the last release of Thesaurus it was generated from. The current mapping file is derived from NCIt version 13.06d and NCIMeta version 201306. For previous releases of the NCI Thesaurus please see the archives at ftp://ftp1.nci.nih.gov/pub/cacore/EVS/NCI_Thesaurus/archive/ For additional information, please see the Release Notes of LexEVS 5.1. (https://wiki.nci.nih.gov/display/EVS/LexEVS+5.1+Release+Notes)