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CQL Conformance

Implementation State of ELM Forms

The section numbers refer to the documentation of the ELM Specification v1.5.1. Please note that CQL itself translates to ELM, but doesn't use every ELM feature. Because Blaze implements ELM and not CQL directly, the documentation is about the ELM forms and not about the CQL forms. A clear view about the CQL coverage of Blaze is not available yet.

1. Simple Values

Num Group Expression State Notes
1.1. Literal ! only Boolean, Integer, Decimal, String

2. Structured Values

Num Group Expression State Notes
2.1. Tuple ✓
2.2. Instance ✓
2.3. Property ! no full FHIRPath FHIRPath is not used by CQL

3. Clinical Values

Num Group Expression State Notes
3.1. Code ✓
3.2. CodeDef ✓
3.3. CodeRef ! only inside same library
3.4. CodeSystemDef ✓
3.5. CodeSystemRef ! only inside same library
3.6. Concept ✓
3.7. ConceptDef ✓
3.8. ConceptRef ✓
3.9. Quantity ✓
3.10. Ratio ✓
3.11. ValueSetDef ✗
3.12. ValueSetRef ✗

4. Type Specifiers

Num Group Expression State Notes
4.1. TypeSpecifier ✓
4.2. NamedTypeSpecifier ✓
4.3. IntervalTypeSpecifier ✓
4.4. ListTypeSpecifier ✓
4.5. TupleTypeSpecifier ✓
4.6. ChoiceTypeSpecifier ✓

5. Libraries

Num Group Expression State Notes
5.1. Library ✓
5.2. IncludeDef ! no custom includes, only FHIRHelpers
5.3. VersionedIdentifier ✗
5.4. ContextDef ✗

6. Data Model

Num Group Expression State Notes
6.1. UsingDef ! only FHIR R4

7. Parameters

Num Group Expression State Notes
7.1. ParameterDef ✓
7.2. ParameterRef ✓

8. Expressions

Num Group Expression State Notes
8.1. Expression ✓
8.2. OperatorExpression ✓
8.3. UnaryExpression ✓
8.4. BinaryExpression ✓
8.5. TernaryExpression ✓
8.6. NaryExpression ✓
8.7. AggregateExpression ✓

9. Reusing Logic

Num Group Expression State Notes
9.1. ExpressionDef ✓
9.2. ExpressionRef ! only inside same library
9.3. FunctionDef ✓
9.4. FunctionRef ! hard coded implementation of some functions
9.5. OperandRef ✓

10. Queries

Num Group Expression State Notes
10.1. Query ✓
10.2. AliasedQuerySource ! only single source
10.3. AliasRef ✓
10.4. ByColumn ✓
10.5. ByDirection ✓
10.6. ByExpression ✓
10.7. IdentifierRef ✓
10.8. LetClause ✗
10.9. QueryLetRef ✗
10.10. RelationshipClause ✓
10.11. ReturnClause ✓
10.12. AggregateClause ✗
10.13. SortClause ✓
10.14. With ✓
10.15. Without ✓

11. External Data

Num Group Expression State Notes
11.1. Retrieve ! no date ranges
11.2. IncludeElement ✗

12. Comparison Operators

Num Group Expression State Notes
12.1. Equal ✓
12.2. Equivalent ✓
12.3. Greater ✓
12.4. GreaterOrEqual ✓
12.5. Less ✓
12.6. LessOrEqual ✓
12.7. NotEqual ✓

13. Logical Operators

Num Group Expression State Notes
13.1. And ✓
13.2. Implies ✓
13.3. Not ✓
13.4. Or ✓
13.5. Xor ✓

14. Nullological Operators

Num Group Expression State Notes
14.1. Null ✓
14.2. Coalesce ✓
14.3. IsFalse ✓
14.4. IsNull ✓
14.5. IsTrue ✓

15. Conditional Operators

Num Group Expression State Notes
15.1. Case ✓
15.2. If ✓

16. Arithmetic Operators

Num Group Expression State Notes
16.1. Abs ✓
16.2. Add ✓
16.3. Ceiling ✓
16.4. Divide ✓
16.5. Exp ✓
16.6. Floor ✓
16.7. HighBoundary ✗
16.8. Log ✓
16.9. LowBoundary ✗
16.10. Ln ✓
16.11. MaxValue ✓
16.12. MinValue ✓
16.13. Modulo ✓
16.14. Multiply ✓
16.15. Negate ✓
16.16. Power ✓
16.17. Precision ✗
16.18. Predecessor ✓
16.19. Round ✓
16.20. Subtract ✓
16.21. Successor ✓
16.22. Truncate ✓
16.23. TruncatedDivide ✓

17. String Operators

Num Group Expression State Notes
17.1. Combine ✓
17.2. Concatenate ✓
17.3. EndsWith ✓
17.4. Equal ✓
17.5. Equivalent ✗
17.6. Indexer ✓
17.7. LastPositionOf ✓
17.8. Length ✓
17.9. Lower ✓
17.10. Matches ✓
17.11. Not Equal ✓
17.12. PositionOf ✓
17.13. ReplaceMatches ✓
17.14. Split ✓
17.15. SplitOnMatches ✗
17.16. StartsWith ✓
17.17. Substring ✓
17.18. Upper ✓

18. Date and Time Operators

Num Group Expression State Notes
18.1. Add ✓
18.2. After ✓
18.3. Before ✓
18.4. Equal ✓
18.5. Equivalent ✓
18.6. Date ✓
18.7. DateFrom ✓
18.8. DateTime ✓
18.9. DateTimeComponentFrom ✓
18.10. DifferenceBetween ! same as DurationBetween
18.11. DurationBetween ✓
18.12. Not Equal ✓
18.13. Now ✓
18.14. SameAs ✓
18.15. SameOrBefore ✓
18.16. SameOrAfter ✓
18.17. Subtract ✓
18.18. Time ✓
18.19. TimeFrom ✓
18.20. TimezoneOffsetFrom ✓
18.21. TimeOfDay ✓
18.22. Today ✓

19. Interval Operators

Num Group Expression State Notes
19.1. Interval ✓
19.2. After ✓
19.3. Before ✓
19.4. Collapse ✓
19.5. Contains ✓
19.6. End ✓
19.7. Ends ✓
19.8. Equal ✓
19.9. Equivalent ✓
19.10. Except ✓
19.11. Expand ✗
19.12. In ✓
19.13. Includes ✓
19.14. IncludedIn ✓
19.15. Intersect ✓
19.16. Meets ✓
19.17. MeetsBefore ✓
19.18. MeetsAfter ✓
19.19. Not Equal ✓
19.20. Overlaps ✓
19.21. OverlapsBefore ✓
19.22. OverlapsAfter ✓
19.23. PointFrom ✓
19.24. ProperContains ✓
19.25. ProperIn ✓
19.26. ProperIncludes ✓
19.27. ProperIncludedIn ✓
19.28. Size ✗
19.29. Start ✓
19.30. Starts ✓
19.31. Union ✓
19.32. Width ✓

20. List Operators

Num Group Expression State Notes
20.1. List ✓
20.2. Contains ✓
20.3. Current ✓
20.4. Distinct ✓
20.5. Equal ✓
20.6. Equivalent ✓
20.7. Except ✓
20.8. Exists ✓
20.9. Filter ✓
20.10. First ✓
20.11. Flatten ✓
20.12. ForEach ✓
20.13. In ✓
20.14. Includes ✓
20.15. IncludedIn ✓
20.16. IndexOf ✓
20.17. Intersect ✓
20.18. Last ! no orderBy
20.19. Not Equal ✓
20.20. ProperContains ✓
20.21. ProperIn ✓
20.22. ProperIncludes ✓
20.23. ProperIncludedIn ✓
20.24. Repeat ✗
20.25. SingletonFrom ✓
20.26. Slice ✓
20.27. Sort ✓
20.28. Times ✓
20.29. Union ✓

21. Aggregate Operators

Num Group Expression State Notes
21.1. AllTrue ! no path path not used from CQL
21.2. AnyTrue ! no path path not used from CQL
21.3. Avg ! no path path not used from CQL
21.4. Count ! no path path not used from CQL
21.5. GeometricMean ! no path path not used from CQL
21.6. Product ! no path path not used from CQL
21.7. Max ! no path path not used from CQL
21.8. Median ! no path path not used from CQL
21.9. Min ! no path path not used from CQL
21.10. Mode ! no path path not used from CQL
21.11. PopulationVariance ! no path path not used from CQL
21.12. PopulationStdDev ! no path path not used from CQL
21.13. Sum ! no path path not used from CQL
21.14. StdDev ! no path path not used from CQL
21.15. Variance ! no path path not used from CQL

22. Type Operators

Num Group Expression State Notes
22.1. As ! no strictness
22.2. CanConvert ✗
22.3. CanConvertQuantity ✓
22.4. Children ✓
22.5. Convert ✗
22.6. ConvertQuantity ✓
22.7. ConvertsToBoolean ✓
22.8. ConvertsToDate ✓
22.9. ConvertsToDateTime ✓
22.10. ConvertsToDecimal ✓
22.11. ConvertsToLong ✓
22.12. ConvertsToInteger ✓
22.13. ConvertsToQuantity ✓
22.14. ConvertsToRatio ✓
22.15. ConvertsToString ✓
22.16. ConvertsToTime ✓
22.17. Descendents ✓
22.18. Is ✓
22.19. ToBoolean ✓
22.20. ToChars ✓
22.21. ToConcept ✓
22.22. ToDate ✓
22.23. ToDateTime ✓
22.24. ToDecimal ✓
22.25. ToInteger ✓
22.26. ToList ✓
22.27. ToLong ✓
22.28. ToQuantity ✓
22.29. ToRatio ✓
22.30. ToString ✓
22.31. ToTime ✓

23. Clinical Operators

Num Group Expression State Notes
23.1. AnyInCodeSystem ✗
23.2. AnyInValueSet ✗
23.3. CalculateAge ✓
23.4. CalculateAgeAt ✓
23.5. Equal ✓
23.6. Equivalent ✓
23.7. InCodeSystem ✗
23.8. InValueSet ✗
23.9. ExpandValueSet ✗
23.10. Not Equal ✓
23.11. SubsumedBy ✗
23.12. Subsumes ✗

24. Errors and Messages

Num Group Expression State Notes
24.1. Message ✗