Unified Medical Language System® (UMLS®) Basics

The Rich Release Format (RRF) Subset Browser

The RRF Subset browser provides users with an easy way to search local subsets, print concept reports, and view raw file information for a specific concept. It is included in MetamorphoSys on the UMLS DVD or available for download from the UMLSKS. The RRF Subset browser can only access Rich Release Format subsets.

Users can search for a concept by:

• Concept number, for example (C0027051)
• String (with right truncation), for example (heart att*)
• By code, for example (D003924, the MeSH code for Diabetes Mellitus, Non-Insulin-Dependent)
• Using a tree browser to search the hierarchy

Clicking on an item from the search results list will display the concept information. Users can view concept date in the easily printed report view or the raw records view.

Users can filter the results of their searches by semantic type, content view flag, or source and change the display of the data using the 'Restrict Searches and Views' option from the options drop down menu. Other options include limiting the maximum number of child terms displayed and restricting a search string and the results to a specific language.