An expression that contains A 

Notes

• Precoordinated expressions combine all aspects of a potentially multifaceted

  Gloss
  t concept

   into a single discreet form. 
• The syntax used to represent SNOMED CT expressions is called the 

  Gloss
  t SNOMED CT

   technical specifications include guidance for transforming logical expressions into a common canonical form

  compositional grammar

   and is formally defined in the Compositional Grammar - Specification and Guide.

Example

• The procedure, laparoscopic emergency appendectomy can be represented with the precoordinated expression 174041007 |laparoscopic emergency appendectomy| to record an instance of this procedure. This procedure has at least three distinct facets: removal of appendix, using a laparoscope, and as an emergency procedure. 

  Gloss
  t SNOMED CT

   precoordinates these facets in one 

  Gloss
  t concept

  .

...

• Precoordinated
• Precoordination

Related Links

• Glossary

  • Gloss
    t SNOMED CT expression

    
    

  • Gloss
    t

  Postcoordinated

  • postcoordinated expression

  • Gloss
    t compositional grammar

• Compositional Grammar - Specification and GuidePrecoordinated and Postcoordinated Representations