Welcome to the Neighborhood Auditing Tool (NAT) User Manual

The Neighborhood Auditing Tool (or NAT for short) is a specialized tool designed to help auditors of the Unified Medical Language System (UMLS) find potential errors. The NAT uses a hybrid diagram/text interface which allows a user to easily navigate and view the UMLS terminology and the different panels are laid out in a way to show the relationships between concepts in a simple and intuitive manner.

This work was partially supported by the United States National Library of Medicine under grant R 01 LM008445-01A2.