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default
Expression Type: A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used.
Expression
Path
Expression
Id
Expression
Cardinality
0 - *
Definition
A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
exp-1 [error]
An expression or a reference must be provided
exp-2 [error]
The name must be a valid variable name in most computer languages
Path
Expression.description
Id
Expression.description
Type
Cardinality
0 - 1
Definition
A brief, natural language description of the condition that effectively communicates the intended semantics.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
Expression.name
Id
Expression.name
Type
Cardinality
0 - 1
Definition
A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
exp-2
Path
Expression.expression
Id
Expression.expression
Type
Cardinality
0 - 1
Definition
An expression in the specified language that returns a value.
Comment
If Expression.expression and Expression.reference are both present, the Expression.expression might just be a name pointing something within the referenced content.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
exp-1
Path
Expression.reference
Id
Expression.reference
Type
Cardinality
0 - 1
Definition
A URI that defines where the expression is found.
Comment
If both a reference and an expression is found, the reference SHALL point to the same expression.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
exp-1