Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Abstraction networks"”.
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Structural analysis and auditing of SNOMED hierarchies using abstraction networks
… groups of more manageable sizes. Three related abstraction networks with respect to a SNOMED hierarchy, namely the area taxonomy, partial-area taxonomy, and disjoint partial-area taxonomy, are derived programmatically from the partitions. Altogether they afford high-level abstraction views of …
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Designing novel abstraction networks for ontology summarization and quality assurance
… that utilize the ontology. In prior studies abstraction networks (AbNs) were developed to provide a compact summary of an ontology's content and structure. AbNs have been shown to successfully support ontology summarization and quality assurance (QA), e.g., for SNOMED CT and NCIt. Despite the …
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Extensions of SNOMED taxonomy abstraction networks supporting auditing and complexity analysis
… the partial-area taxonomy, a hierarchical abstraction network consisting of units called partial-areas. Each partial-area comprises a set of SNOMED concepts exhibiting a particular relationship structure and being distinguished by a unique root concept. In this dissertation, some extensions …
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Using structural and semantic methodologies to enhance biomedical terminologies
… applies Quality Assurance techniques based on "Abstraction Networks" to biomedical ontologies in BioPortal. The National Center for Biomedical Ontology provides B ioPortal as a repository of over 350 biomedical ontologies covering a wide range of domains. It is extremely difficult to design a …
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Structural auditing methodologies for controlled terminologies
… 7,000) relationships. Therefore, a higher-level abstraction for the SN called a metaschema, is constructed. Its nodes are meta-semantic types, each representing a connected group of semantic types of the SN. One of the auditing methodologies is based on a kind of metaschema called a cohesive …
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Abstraction, extension and structural auditing with the UMLS semantic network
… the META. Although the SN provides a high-level abstraction for the META, it is not compact enough. Various metaschemas, which are compact higher-level abstraction networks of the SN, have been derived. A methodology is presented to evaluate and compare two given metaschemas, based on their …