Designing metaschemas for the UMLS enriched semantic network
نویسندگان
چکیده
منابع مشابه
Designing metaschemas for the UMLS enriched semantic network
The enriched semantic network (ESN) has previously been presented as an enhancement of the semantic network (SN) of the UMLS. The ESN's hierarchy is a DAG (Directed Acyclic Graph) structure allowing for multiple parents. The ESN is thus more complex than the SN and can be more difficult to view and comprehend. We have previously introduced the notion of a metaschema for the SN as a compact abst...
متن کاملAn Enriched UMLS Semantic Network with a Multiple Subsumption Hierarchy
Objective: The Unified Medical Language System’s (UMLS’s) Semantic Network’s (SN’s) two-tree structure is restrictive because it does not allow a semantic type to be a specialization of several other semantic types. In this paper, the SN is expanded into a multiple subsumption structure with a directed acyclic graph (DAG) IS-A hierarchy, allowing a semantic type to have multiple parents. New vi...
متن کاملRevising the UMLS Semantic Network
The integration of standardized biomedical terminologies into a single, unified knowledge representation system has formed a key area of applied informatics research in recent years. The Unified Medical Language System (UMLS) is the most advanced and most prominent effort in this direction, bringing together within its Metathesaurus a large number of distinct source-terminologies. The UMLS Sema...
متن کاملRelationship Structures and Semantic Type Assignments of the UMLS Enriched Semantic Network
Design: The technique to derive the ESN’s relationship structures finds all newly inherited relationships in the ESN. All such relationships are audited for semantic validity, and the blocking mechanism is used to block invalid relationships. The mapping technique to derive the ESN’s semantic type assignments uses current SN semantic type assignments and preserves nonredundant categorizations, ...
متن کاملModel Formulation: Relationship Structures and Semantic Type Assignments of the UMLS Enriched Semantic Network
OBJECTIVE The Enriched Semantic Network (ESN) was introduced as an extension of the Unified Medical Language System (UMLS) Semantic Network (SN). Its multiple subsumption configuration and concomitant multiple inheritance make the ESN's relationship structures and semantic type assignments different from those of the SN. A technique for deriving the relationship structures of the ESN's semantic...
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ژورنال
عنوان ژورنال: Journal of Biomedical Informatics
سال: 2003
ISSN: 1532-0464
DOI: 10.1016/j.jbi.2003.11.006