| June 20th, 2019 |
1.4.1 |
STU4 Release. Changes (since the 2019 May Ballot):
- Breaking Changes:
- STU4B#22: Added definitional and referential identifier categories to the grammar to resolve ambiguity
- STU4B#23: Updated semantics of list operators to treat null elements as equal for the purposes of membership determination
- STU4B#27: Changed ToDateTime(Date) to leave time components unspecified
- STU4B#70: Changed "Unspecified" context name to "Unfiltered"
- STU4B#94: Removed the scope attribute from the Retrieve in ELM
- Breaking Changes (from 2019 May Ballot only):
- STU4B#79: Required related context retrieve expression to return a singleton
- STU4B#114: ConvertQuantity operator now throws an error if the implementation does not support the conversion
- Substantive Changes:
- STU4B#29: Added contextTargetRelationship to model information to support identifying target context elements
- STU4B#32: Added target element to model information
- STU4B#35: Changed timing phrase translations to add null check when the translation constructs an interval from a nullable element
- STU4B#36: Added Precision, LowBoundary, and HighBoundary operators for Decimal, DateTime, Date, and Time types
- STU4B#87: Added Ratio overload of ToQuantity operator
- STU4B#109: Code paths specified in retrieves can now use literal indexers
Detailed Change Log
| March 24th, 2019 |
1.4.0 |
STU4 Ballot. Changes:
- Breaking Changes:
- #1716: Added support for non-patient, model-defined contexts
- #1723: Define seconds as a Decimal for the purposes of comparison
- #1724: Removed timezone offset from Time; changed timezone keyword to timezoneoffset
- #1722: Removed the 'T' prefix from time formatting strings
- Substantive Changes:
- #1707: Added a Size operator for intervals
- #1719: Added support for namespaces for library names
- #1720: Added support for qualifiers in retrieve code paths
- #1722: Updated FHIRPath usage and translation mappings for FHIRPath Normative 3 ballot
- #1727: Added unit conversion support for quantities
- #1766: Added valuesetProperty to ELM Retrieve
- Added support for related-context queries
Detailed Change Log
|
| STU3 sequence |
| September 5, 2018 |
1.3.1 |
STU3 Release. Changes:
- Equality for types with components now only returns null if the values have different elements specified
- List membership and duplicate detection now use equality rather than equivalence semantics throughout
- Clarified date/time equality/equivalence/comparison semantics
- Symbolic date/time comparisons now occur at finest precision specified in either value
- Clarified relationship between symbolic/specified comparison operators
- Clarified relationship between date/time and interval overloads for equality/equivalence/comparison operators
- Clarified definition and behavior of interval promotion and demotion and indicated it is optional and disabled by default
- Improved conversion precedence
- Removed "week" operations that require a "week number"
- Changed AgeInYears() and AgeInMonths() to use Date, not DateTime
- Added a per clause to collapse
- Added SplitOnMatches
- Added backtick-delimited identifiers
- ELM operator content is now generated from the ELM model
- Numerous clarifications and errata throughout
- Added sidebar navigation
Detailed change log
|
| April 1st, 2018 |
1.3.0 |
STU3 Ballot. Changes:
- Language Changes:
- Added Ratio and Date system-defined types
- Added difference of and duration between syntax
- Named type specifiers now allow multiple qualifiers
- Added Product and GeometricMean aggregate operators
- Added Expand interval set operator
- Invalid quantity operations and conversions now return null instead of error
- Exists now ignores null elements
- Added implicit conversion from Integer or Decimal to Quantity
- ELM Changes:
- Added signature element to FunctionRef
- Added ELM classes for new operators
- BinaryExpression and TernaryExpression are now abstract
- Union, Intersect, and Except are now NaryExpressions
- FHIRPath Support:
- Added mappings for hasValue, conformsTo, memberOf, subsumes, subsumedBy, toChars
- Added support for new aggregate()
- Added support for $index and $total accessors
Detailed change log
|
| STU2 sequence |
July 2017 (published link)
July 2017 (web version)
|
1.2.1 |
STU2 Release. Changes:
- Adopted FHIRPath grammar as basis for expressions
- Support for paths
- Method-style invocation
- List promotion and demotion
- Empty list as null semantics
- $ and % identifier scopes
- Additional FHIRPath operators
- Support for declaration-only libraries
- Added choice type support
- Added Message operator to support run-time messages, errors, and warnings
- Added external function declarations
- Added debug and type information to ELM
- Specified JSON format for ELM
- Added less than/more than timing phrase modifiers
- Added on or/or on timing phrase modifiers
- Relaxed syntactic restriction on terminology target in a retrieve
Detailed change log
|
| STU1 sequence |
| July 2016 |
1.1 |
DSTU Update. Changes:
- Changed define clause to let within queries
- Changed matches to ~
- Changed <> to !=
- Changed lists to be 0-based instead of 1-based
- Renamed expand to flatten
- Added implicit conversion from List<Code> to Concept
- Added Exp operator (inverse of Ln)
- Added weeks duration
- Added support for forward declarations
- Added concept and code declarations
Detailed change log
|
| May 2015 |
1.0 |
STU1 Release May 2015 |
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