The relationship between two classes that have the same logical meaning.

Notes

• The equivalent classes may be represented in different ways for example as , , or  expressed using a syntax such as .
• Semantic equivalence is represented by the Ξ symbol or by a sequence of three equals signs === .

Example

• The expression below asserts that the concept  has semantic equivalence with  with method  applied to the direct site . 
  

  
  

  80146002 |Appendectomy| === 71388002 |Procedure|: {405813007 |Procedure site - Direct| = 66754008 |Appendix structure|, 260686004 |Method| = 129304002 |Excision - action|}

Alternatives

• Concept equivalence
• Equivalence