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Content Completeness Problem
The inability of an ontology to include or encode every concept of interest to users of an ontology is known as the "content completeness problem". The problem stems from ''the greater expressiveness of natural language relative to the finite enumeration of concepts present in an ontology''. A specific instance of this problem may be temporarily resolved by adding missing concept/s to the target ontology, but this approach is not a general solution because in practice: # There is a lag time between the appearance and usage of a concept in a domain and its incorporation into an ontology. # In large ontologies it is difficult to know if the concept is already present Other workarounds to this problem include the use of post-coordination in ontologies (such as SNOMED CT SNOMED CT or SNOMED Clinical Terms is a systematically organized computer-processable collection of medical terms providing codes, terms, synonyms and definitions used in clinical documentation and reporting. SNOMED ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontology
In metaphysics, ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions like how entities are grouped into categories and which of these entities exist on the most fundamental level. Ontologists often try to determine what the categories or highest kinds are and how they form a system of categories that encompasses classification of all entities. Commonly proposed categories include substances, properties, relations, states of affairs and events. These categories are characterized by fundamental ontological concepts, including particularity and universality, abstractness and concreteness, or possibility and necessity. Of special interest is the concept of ontological dependence, which determines whether the entities of a category exist on the most fundamental level. Disagreements within ontology are often about whether entities belonging to a certain category exist and, if so, ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SNOMED CT
SNOMED CT or SNOMED Clinical Terms is a systematically organized computer-processable collection of medical terms providing codes, terms, synonyms and definitions used in clinical documentation and reporting. SNOMED CT is considered to be the most comprehensive, multilingual clinical healthcare terminology in the world. The primary purpose of SNOMED CT is to encode the meanings that are used in health information and to support the effective clinical recording of data with the aim of improving patient care. SNOMED CT provides the core general terminology for electronic health records. SNOMED CT comprehensive coverage includes: clinical findings, symptoms, diagnoses, procedures, body structures, organisms and other etiologies, substances, pharmaceuticals, devices and specimens. SNOMED CT is maintained and distributed by SNOMED International, an international non-profit standards development organization, located in London, UK. SNOMED International is the trading name of the Inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
