Representing biomedical knowledge in the UMLS semantic network
High performance medical libraries
Controlled Vocabularies in OODBs: Modeling Issues and Implementation
Distributed and Parallel Databases
Introduction to Human Factors Engineering (2nd Edition)
Introduction to Human Factors Engineering (2nd Edition)
Research on structural issues of the UMLS: past, present, and future
Journal of Biomedical Informatics - Special issue: Unified medical language system
Designing metaschemas for the UMLS enriched semantic network
Journal of Biomedical Informatics - Special issue: Unified medical language system
Journal of Biomedical Informatics - Special issue: Unified medical language system
A lexical metaschema for the UMLS semantic network
Artificial Intelligence in Medicine
Comparing and consolidating two heuristic metaschemas
Journal of Biomedical Informatics
Structural group auditing of a UMLS semantic type's extent
Journal of Biomedical Informatics
A review of auditing methods applied to the content of controlled biomedical terminologies
Journal of Biomedical Informatics
Auditing associative relations across two knowledge sources
Journal of Biomedical Informatics
Journal of Biomedical Informatics
The Neighborhood Auditing Tool: A hybrid interface for auditing the UMLS
Journal of Biomedical Informatics
An expert study evaluating the UMLS lexical metaschema
Artificial Intelligence in Medicine
Semantic mappings and locality of nursing diagnostic concepts in UMLS
Journal of Biomedical Informatics
Auditing concept categorizations in the UMLS
Artificial Intelligence in Medicine
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The Unified Medical Language System (UMLS) joins together a group of established medical terminologies in a unified knowledge representation framework. Two major resources of the UMLS are its Metathesaurus, containing a large number of concepts, and the Semantic Network (SN), containing semantic types and forming an abstraction of the Metathesaurus. However, the SN itself is large and complex and may still be difficult to view and comprehend. Our structural partitioning technique partitions the SN into structurally uniform sets of semantic types based on the distribution of the relationships within the SN. An enhancement of the structural partition results in cohesive, singly rooted sets of semantic types. Each such set is named after its root which represents the common nature of the group. These sets of semantic types are represented by higher-level components called meta-semantic types. A network, called a metaschema, which consists of the meta-semantic types connected by hierarchical and semantic relationships is obtained and provides an abstract view supporting orientation to the SN. The metaschema is utilized to audit the UMLS classifications. We present a set of graphical views of the SN based on the metaschema to help in user orientation to the SN. A study compares the cohesive metaschema to metaschemas derived semantically by UMLS experts.