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The definition of a conceptcan be logically transformed between different views without loss of meaning based on the definitions of related conceptsFor example:

Consider the following set of defining relationships:

Based on the above five relationships it is possible to infer a new relationship:

The definition of 53057004 |Hand pain|can thus be viewed in three semantically identical forms:

  1. As originally stated:


   2. With the additional inferred relationship:


3. With the inferred relationship but without the redundant stated relationship |is a|   |pain|

The relationship

  |is a| |pain| is redundant because this can be determined by traversing the 116680003 |is a| relationshipto 102556003 |pain in upper limb|which in turn is defined as |is a|   |pain|  

The result of manipulations like this is that several distinct views of the logical abstract model can be described based on the manner in which they are derived.

Different views of conceptdefinitions vary in one or more of the following three dimensions:

  • Flattened or nested;
  • Stated or inferred;
  • Direction and extent of logical transformation

These three dimensions are considered in the following subsections of this guide.