Source indicates the location of the directory containing the UMLS files to be installed. Enter the location of the directory or use
to select the directory. 
Destination indicates the directory on the local drive where the UMLS files will be installed. A top level UMLS folder will be created to contain these files. Enter the information or use
to select the destination.Install one or all of the UMLS Knowledge Sources:
By default all three Knowledge Sources are selected. Click inside
(the check box) to uncheck and deselect a Knowledge Source. Uncheck any Knowledge Source not required in the local UMLS application.
By default all three Knowledge Sources are selected. Click inside
(the check box) to uncheck and deselect a Knowledge Source. Uncheck any Knowledge Source not required in the local UMLS application.
to proceed with installation. This step creates the directory for the UMLS Knowledge Sources files, and copies the Semantic Network and SPECIALIST Lexicon files to the hard drive.