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library

The root rule of every CQL file. A library may optionally begin with a library declaration, followed by zero or more definitions (using, include, codesystem, valueset, code, concept, parameter), then zero or more statements (expressions, contexts, functions), and finally the end-of-file marker.

Examples

A minimal library with no declarations

library MinimalLibrary

A full library with a model import, included library, and an expression

library ExampleLibrary version '1.0.0'

using FHIR version '4.0.1'

include FHIRHelpers version '4.0.1' called FHIRHelpers

codesystem "SNOMED-CT": 'http://snomed.info/sct'

define "Adult":
  AgeInYears() >= 18
Railroad Diagram
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libraryDefinition definition statement EOF

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EBNF

library
  : libraryDefinition?
    definition*
    statement*
    EOF
  ;