#knowledge_domain__knowledgedomain__knowledge_base__knowledgebase  the content of a particular domain or field of knowledge
  supertype:  cognitive_content__cognitivecontent__content__mental_object  the sum or range of what has been perceived, discovered, or learned
  object of:  domain
  subtype:  domain.knowledge_domain__region__realm  a knowledge domain that you are interested in or are communicating about; "it was a limited domain of discourse"; "here we enter the region of opinion"; "the realm of the occult"
  subtype:  scientific_knowledge  knowledge accumulated by systematic study and organized by general principles; "mathematics is the basis for much scientific knowledge"

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