It uses some of the tables used by MetaMap but all lexical variants used in the table are pre-processed. Named Entities are found using longest match. Restriction by UMLS source and Semantic type is optional. Part-of-speech tagging which improves precision by a small amount (at the cost of speed) is also optional. Negation detection is available using either Wendy Chapman's context or a native negation detection algorithm based on Wendy Chapman's NegEx which is somewhat less effective, but faster.
- MetaMapLite requires a minimum of 16GB of disk space when it has been uncompressed.
- MetaMapLite requires a minimum of 2GB of memory to run. At least 4GB is recommended.
- You will need a working version of bunzip2 to uncompress the MetaMapLite download file. If you do not have a copy of bunzip2, it is available from http://www.bzip.org/.
- To run MetaMapLite, you will need the Java Runtime Environment (JRE). We have tested MetaMapLite with JRE 1.7. The JRE is available from: http://www.java.com
- To use MetaMapLite, you must comply with the MetaMap Terms and Conditions.
- To download MetaMapLite,
you must have accepted the terms of the
License Agreement, which requires you to respect the copyrights
of the constituent vocabularies and to file a brief annual report on
your use of the UMLS. You also must have activated
a UMLS Terminology Services (UTS)
account. For information on how we use UTS authentication please select
the Info icon to the right:
For details of the licenses see the UMLS Metathesaurus License Agreement and How to License and Access the Unified Medical Language System® (UMLS®) Data.