April 7, 2014

This directory contains files of sub-trees of the NCI Thesaurus (NCIt), as well as a package
of the program used to generate these sub-trees (ExtractBranches.zip).  

There are two types of sub-trees published here, the first kind is a sub-tree whose root 
node is one of the root nodes of the NCIt; we are publishing all of the sub-trees of the 
NCIt represented by these root nodes (denoted as Domain Trees below).  The second kind of 
sub-tree contains root nodes that are internal nodes in the NCIt; we only publish a few of 
these (denoted as Subdomain Trees below).

The filenames of the branch/sub-trees are based on the Preferred Name of the root concept
used to build the tree, where spaces and punctuation are replaced with underscores.

The published trees include all property class restrictions.  End-users can also generate 
their own trees with all restrictions as above, or missing all restrictions, or containing 
only restrictions with filler values within the domain of the tree.  Please see the ReadMe 
included in the ExtractBranches.zip package for additional information.

Finally, the trees in this directory will be generated monthly with each new release of the
NCIt.  Older versions of the trees will not be archived.  Users that need to examine sub-trees
of older versions of the NCIt can extract them with the ExtractBranches program.



Contents - Files:

Program package
---------------

ExtractBranches.zip


Domain Trees
---------------

Abnormal_Cell.zip
Activity.zip
Anatomic_Structure_System_or_Substance.zip
Biochemical_Pathway.zip
Biological_Process.zip
Chemotherapy_Regimen_or_Agent_Combination.zip
Conceptual_Entity.zip
Diagnostic_or_Prognostic_Factor.zip
Disease_Disorder_or_Finding.zip
Drug_Food_Chemical_or_Biomedical_Material.zip
Experimental_Organism_Anatomical_Concept.zip
Experimental_Organism_Diagnosis.zip
Gene.zip
Gene_Product.zip
Manufactured_Object.zip
Molecular_Abnormality.zip
NCI_Administrative_Concept.zip
Organism.zip
Property_or_Attribute.zip
Retired_Concept.zip

Subdomain Trees
---------------

Chemotherapy_Regimen.zip
Neoplasm.zip
Pharmacologic_Substance.zip