A  that represents an  in which one or more elements are replaced by .

Notes

• An expression template includes one or more predefined variables which when replaced by appropriate values creates a conformant expression.
• An expression template can be used to specify how data items entered via several controls in a structured user interface should be combined to represent a composite meaning.
• Expression templates are also used to formally represent  associated with different .
• Expression templates are one of several types of templates defined by the SNOMED CT Template Syntax Specification.  

Examples

• The example expression template below specifies a  for a family history data entry context. In this context, a subtype of  will be interpreted as the value of the  attribute. Similarly, the concept  or one of its subtypes will be interpreted as the value of the  attribute. The template assigns the names @disease and @subject to these slots, which allows them to be referenced from specific user interface controls.

57177007 |Family history with explicit context (situation)| :
            { 408731000 |Temporal context (attribute)| = 410511007 |Current or past (actual) (qualifier value)|, 
              246090004 |Associated finding (attribute)| = [[+id ( < 64572001 |Disease (disorder)| ) @disease ]], 
              408729009 |Finding context (attribute)| = 410515003 |Known present (qualifier value)|, 
              408732007 |Subject relationship context (attribute)| = [[+id ( << 444148008 |Person in family of subject (person)| ) @subject ]]}

• If  is entered in the @disease slot and  is entered in the @subject  slot, the result is the expression, shown below, stating that the father of the patient has (or had) .

57177007 |Family history with explicit context (situation)| :
            { 408731000 |Temporal context (attribute)| = 410511007 |Current or past (actual) (qualifier value)|, 
              246090004 |Associated finding (attribute)| = 44054006 |Diabetes mellitus type 2|, 
              408729009 |Finding context (attribute)| = 410515003 |Known present (qualifier value)|, 
              408732007 |Subject relationship context (attribute)| = 66839005 |Father| }

Alternatives

• Expression template

Related Links

• Glossary
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  • 
  • 
• Specification
  • Template Syntax Specification
    • 6.1. Expression Template Language
    • 8. Expression Template Examples