CQL Language Capability - Clinical Quality Language Specification v2.0.0-cibuild

Clinical Quality Language Specification, published by Clinical Decision Support WG. This guide is not an authorized publication; it is the continuous build for version 2.0.0-cibuild built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/cql/ and changes regularly. See the Directory of published versions

ValueSet: CQL Language Capability

Official URL: http://cql.hl7.org/ValueSet/cql-language-capability				Version: 2.0.0-cibuild
Standards status: Trial-use			Maturity Level: 2	Computable Name: CQLLanguageCapability

Codes for CQL language capabilities.

References

This value set is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

Logical Definition (CLD)

Include all codes defined in http://cql.hl7.org/CodeSystem/cql-language-capabilities version 📦2.0.0-cibuild

Expansion

Expansion performed internally based on codesystem CQL Language Capability Codes v2.0.0-cibuild (CodeSystem)

This value set contains 241 concepts

Level	System	Code	Display (en)	Definition	JSON	XML
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	decimal-precision-and-scale	Decimal precision and scale	How many total digits (precision) and how many digits to the right of the decimal point (scale) the implementation supports for Decimal values.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	datetime-precision-and-scale	Datetime precision and scale	The finest granularity (precision) and smallest increment (scale) supported for date/time values.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	ucum-unit-conversion-support	UCUM unit conversion support	Whether and how the engine can automatically convert between units of measure using UCUM.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	regex-dialect	Regex dialect	Which flavor of regular expressions the implementation supports.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	supported-data-models	Supported data models	Which external models the engine can evaluate against.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	expand-operator	Expand operator	Expand on ValueSet/Interval.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	fhirpath-support	FHIRPath Support	Ability to evaluate/translate FHIRPath within CQL.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	precision-operators-for-decimal-and-date-time-types	Precision operators for Decimal and Date/Time types	Operators that adjust/control precision.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	model-defined-contexts	Model-defined contexts	Contexts defined by the data model.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	library-namespaces	Library namespaces	Organize libraries into namespaces.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	related-context-retrieves	Related-context retrieves	Context-relative retrieve operations.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	unit-conversion-support	Unit conversion support	Convert between compatible UCUM units.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	modular-arithmetic-for-quantities	Modular arithmetic for quantities	Modulo/remainder with Quantity.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	expand-a-single-interval	Expand a single interval	Expand applied to a single Interval.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	aggregate-clause	Aggregate clause	Query clause for aggregation.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	include-retrieves	Include retrieves	Retrieve that follows model references.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	searchpath-retrieves	Searchpath retrieves	Retrieve using a search path expression.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	id-retrieves	Id retrieves	Retrieve by unique identifier.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system-data-types	System Data Types	Primitive, structured, and collection types defined by the System namespace.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.integer	System.Integer	Whole numbers with no fractional component.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.long	System.Long	64-bit signed integers.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.decimal	System.Decimal	Numbers with fractional precision and scale.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.string	System.String	Sequence of text characters.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.boolean	System.Boolean	Logical truth values.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.date	System.Date	Calendar date without time.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.time	System.Time	Time of day without date.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.datetime	System.DateTime	Date and time point (optional offset).
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.quantity	System.Quantity	Numeric value with unit.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.ratio	System.Ratio	Fractional relationship between two Quantities.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.interval	System.Interval	Range over an ordered type.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.list	System.List	Ordered collection of elements of a type.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.tuple	System.Tuple	Structured type with named elements.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.choice	System.Choice	Value of one among several types.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.codesystem	System.CodeSystem	Reference to an external code system.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.valueset	System.ValueSet	Reference to a set of codes.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	system.vocabulary	System.Vocabulary	Base type for vocabulary-related types.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators	Logical Operators	and, or, not, implies under 3-valued logic.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators.and	Logical Operator and	The and operator returns true if both its arguments are true. If either argument is false, the result is false. Otherwise, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators.or	Logical Operator or	The or operator returns true if either of its arguments are true. If both arguments are false, the result is false. Otherwise, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators.not	Logical Operator not	The not operator returns true if the argument is false and false if the argument is true. Otherwise, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators.xor	Logical Operator xor	The xor (exclusive or) operator returns true if one argument is true and the other is false. If both arguments are true or both arguments are false, the result is false. Otherwise, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	logical-operators.implies	Logical Operator implies	The implies operator returns the logical implication of its arguments. This means that if the left operand evaluates to true, this operator returns the boolean evaluation of the right operand. If the left operand evaluates to false, this operator returns true. Otherwise, this operator returns true if the right operand evaluates to true, and null otherwise
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators	Type Operators	Type inspection and conversion operators.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.as	Type Operator as	The as operator allows the result of an expression to be cast as a given target type. This allows expressions to be written that are statically typed against the expected run-time type of the argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.cast-as	Type Operator as	(See the as operator in addition) The cast prefix indicates that if the argument is not of the specified type at run-time then an exception is thrown.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.is	Type Operator is	The is operator allows the type of a result to be tested. If the run-time type of the argument is the same as or derived from the type being tested, the result of the operator is true; otherwise, the result is false.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.children	Type Operator children	For structured types, the Children operator returns a list of all the values of the elements of the type. List-valued elements are expanded and added to the result individually, rather than as a single list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.descendants	Type Operator descendants	or structured types, the Descendants operator returns a list of all the values of the elements of the type, recursively. List-valued elements are expanded and added to the result individually, rather than as a single list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.convert-quantity	Type Operator convert-quantity	The convert operator converts a value to a specific type. The result of the operator is the value of the argument converted to the target type, if possible. If there is no valid conversion from the actual value to the target type, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-boolean	Type Operator to-boolean	The ToBoolean operator converts the value of its argument to a Boolean value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-integer	Type Operator to-integer	The ToInteger operator converts the value of its argument to an Integer value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-long	Type Operator to-long	The ToLong operator converts the value of its argument to a Long value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-decimal	Type Operator to-decimal	The ToDecimal operator converts the value of its argument to a Decimal value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-quantity	Type Operator to-quantity	The ToQuantity operator converts the value of its argument to a Quantity value. The operation does not perform any unit conversion, that capability is supported by the ConvertQuantity operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-ratio	Type Operator to-ratio	The ToRatio operator converts the value of its argument to a Ratio value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-date	Type Operator to-date	The ToDate operator converts the value of its argument to a Date value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-datetime	Type Operator to-datetime	The ToDateTime operator converts the value of its argument to a DateTime value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-time	Type Operator to-time	The ToTime operator converts the value of its argument to a Time value. The operator expects the string to be formatted using ISO-8601 time representation.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.to-string	Type Operator to-string	The ToString operator converts the value of its argument to a String value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-boolean	Type Operator converts-to-boolean	The ConvertsToBoolean operator returns true if its argument is or can be converted to a Boolean value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-integer	Type Operator converts-to-integer	The ConvertsToInteger operator returns true if its argument is or can be converted to an Integer value. See the ToInteger operator for a description of the supported conversions.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-long	Type Operator converts-to-long	The ConvertsToLong operator returns true if its argument is or can be converted to a Long value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-decimal	Type Operator converts-to-decimal	The ToDecimal operator returns true if its argument is or can be converted to a Decimal value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-quantity	Type Operator converts-to-quantity	The ConvertsToQuantity operator returns true if its argument is or can be converted to a Quantity value. See the ToQuantity operator for a description of the supported conversions.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-ratio	Type Operator converts-to-ration	The ConvertsToRatio operator returns true if its argument is or can be converted to a Ratio value
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-date	Type Operator converts-to-date	The ConvertsToDate operator returns true if its argument is or can be converted to a Date value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-datetime	Type Operator converts-to-datetime	The ConvertsToDateTime operator returns true if its argument is or can be converted to a DateTime value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-time	Type Operator converts-to-time	The ConvertsToTime operator returns true if its argument is or can be converted to a Time value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	type-operators.converts-to-string	Type Operator converts-to-string	The ConvertsToString operator returns true if its argument is or can be converted to a String value.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	nullological-operators	Nullological Operators	Operators dealing with null/missing information.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	nullological-operators.coalesce	Nullological Operators coalesce	The Coalesce operator returns the first non-null result in a list of arguments. If all arguments evaluate to null, the result is null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	nullological-operators.is-null	Nullological Operators is-null	The is null operator determines whether or not its argument evaluates to null. If the argument evaluates to null, the result is true; otherwise, the result is false.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	nullological-operators.is-true	Nullological Operators coalesce	The is true operator determines whether or not its argument evaluates to true. If the argument evaluates to true, the result is true; otherwise, the result is false.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	nullological-operators.is-false	Nullological Operators is-false	The is false operator determines whether or not its argument evaluates to false. If the argument evaluates to false, the result is true; otherwise, the result is false.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators	Comparison Operators	Equal, not equal, <, <=, >, >=, in/not in, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.equal	Comparison Operators equal	The equal (=) operator returns true if the arguments are equal; false if the arguments are known unequal, and null otherwise. Equality semantics are defined to be value-based.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.equivalent	Comparison Operators equivalent	The equivalent (~) operator returns true if the arguments are equivalent in value, or if they are both null; and false otherwise.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.greater	Comparison Operators greater	The greater (>) operator returns true if the first argument is greater than the second argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.greater-or-equal	Comparison Operators greater or equal	The greater or equal (>=) operator returns true if the first argument is greater than or equal to the second argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.less	Comparison Operators less	The less (<) operator returns true if the first argument is less than the second argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.less-or-equal	Comparison Operators less-or-equal	The less or equal (<=) operator returns true if the first argument is less than or equal to the second argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.not-equal	Comparison Operators not-equal	The not equal (!=) operator returns true if its arguments are not the same value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.not-equivalent	Comparison Operators not-equivalent	The not equivalent (!~) operator returns true if its arguments are not equivalent.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	comparison-operators.between	Comparison Operators between	The between operator determines whether the first argument is within a given range, inclusive. If the first argument is greater than or equal to the low argument, and less than or equal to the high argument, the result is true, otherwise, the result is false.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators	Arithmetic Operators	Add, subtract, multiply, divide, mod, round, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.abs	Arithmetic Operators abs	The Abs operator returns the absolute value of its argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.add	Arithmetic Operators add	The add (+) operator performs numeric addition of its arguments.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.ceiling	Arithmetic Operators ceiling	The Ceiling operator returns the first integer greater than or equal to the argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.divide	Arithmetic Operators divide	The divide (/) operator performs numeric division of its arguments. Note that this operator is Decimal division; for Integer division, use the truncated divide (div) operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.floor	Arithmetic Operators floor	The Floor operator returns the first integer less than or equal to the argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.exp	Arithmetic Operators exp	The Exp operator raises e to the power of its argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.highboundary	Arithmetic Operators highboundary	The HighBoundary function returns the greatest possible value of the input to the specified precision.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.log	Arithmetic Operators log	The Log operator computes the logarithm of its first argument, using the second argument as the base.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.lowboundary	Arithmetic Operators lowboundary	The LowBoundary function returns the least possible value of the input to the specified precision.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.ln	Arithmetic Operators ln	The Ln operator computes the natural logarithm of its argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.maximum	Arithmetic Operators maximum	The maximum operator returns the maximum representable value for the given type, defined for the Integer, Long, Decimal, Quantity, Date, DateTime, and Time types.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.minimum	Arithmetic Operators minimum	The minimum operator returns the minimum representable value for the given type, defined for the Integer, Long, Decimal, Quantity, Date, DateTime, and Time types.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.mod	Arithmetic Operators mod	The mod operator computes the remainder of the division of its arguments.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.multiply	Arithmetic Operators multiply	The multiply (*) operator performs numeric multiplication of its arguments.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.negate	Arithmetic Operators negate	The negate (-) operator returns the negative of its argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.precision	Arithmetic Operators precision	The Precision function returns the number of digits of precision in the input value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.predecessor	Arithmetic Operators predecessor	The predecessor operator returns the predecessor of the argument. For example, the predecessor of 2 is 1. If the argument is already the minimum value for the type, a null is returned.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.power	Arithmetic Operators power	The power (^) operator raises the first argument to the power given by the second argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.round	Arithmetic Operators round	The Round operator returns the nearest whole number to its argument. The semantics of round are defined as a traditional round (i.e. to the nearest whole number), meaning that a decimal value greater than or equal to 0.5 and less than 1.0 will round to 1, and a decimal value less than or equal to -0.5 and greater than -1.0 will round to -1.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.subtract	Arithmetic Operators subtract	The subtract (-) operator performs numeric subtraction of its arguments.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.successor	Arithmetic Operators successor	The successor operator returns the successor of the argument. For example, the successor of 1 is 2. If the argument is already the maximum value for the type, a null is returned.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.truncate	Arithmetic Operators truncate	The Truncate operator returns the integer component of its argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	arithmetic-operators.div	Arithmetic Operators div	The div operator performs truncated division of its arguments.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators	String Operators	Length, substring, startsWith, endsWith, matches, replaceMatches, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.combine	String Operators combine	The Combine operator combines a list of strings, optionally separating each string with the given separator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.concatenate	String Operators concatenate	The concatenate (+ or &) operator performs string concatenation of its arguments.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.endwith	String Operators endwith	The EndsWith operator returns true if the given string ends with the given suffix.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.indexer	String Operators indexer	The indexer ([]) operator returns the character at the indexth position in a string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.lastpositionof	String Operators lastpositionof	The LastPositionOf operator returns the 0-based index of the last appearance of the given pattern in the given string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.length	String Operators length	The Length operator returns the number of characters in a string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.lower	String Operators lower	The Lower operator returns the given string with all characters converted to their lower case equivalents.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.matches	String Operators matches	The Matches operator returns true if the given string matches the given regular expression pattern. Regular expressions should function consistently, regardless of any culture- and locale-specific settings in the environment, should be case-sensitive, use partial matching, use single line mode, and allow Unicode characters. The start/end of line markers ^ and $ can be used to match the entire string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.positionof	String Operators positionof	The PositionOf operator returns the 0-based index of the given pattern in the given string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.replacematches	String Operators replacematches	The ReplaceMatches operator matches the given string using the given regular expression pattern, replacing each match with the given substitution. The substitution string may refer to identified match groups in the regular expression. Regular expressions should function consistently, regardless of any culture- and locale-specific settings in the environment, should be case-sensitive, use partial matching, use single line mode, and allow Unicode characters. The start and end of line markers ^, $ can be used to match the entire string.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.split	String Operators split	The Split operator splits a string into a list of strings using a separator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.splitonmatches	String Operators splitonmatches	The SplitOnMatches operator splits a string into a list of strings using a separator that is defined by a regular expression pattern.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.startswith	String Operators startswith	The StartsWith operator returns true if the given string starts with the given prefix.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.substring	String Operators substring	The Substring operator returns the string within stringToSub, starting at the 0-based index startIndex, and consisting of length characters.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	string-operators.upper	String Operators upper	The Upper operator returns the given string with all characters converted to their upper case equivalents.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators	Date and Time Operators	Date/time arithmetic, components, now/today, comparisons, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.add	Date and Time Operators add	The add (+) operator returns the value of the first argument, incremented by the time-valued quantity, respecting variable length periods for calendar years and months.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.after	Date and Time Operators after	The after-precision-of operator compares two Date, DateTime, or Time values to the specified precision to determine whether the first argument is the after the second argument. The comparison is performed by considering each precision in order, beginning with years (or hours for time values). If the values are the same, comparison proceeds to the next precision; if the first value is greater than the second, the result is true; if the first value is less than the second, the result is false; if either input has no value for the precision, the comparison stops and the result is null; if the specified precision has been reached, the comparison stops and the result is false.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.before	Date and Time Operators before	The before-precision-of operator compares two Date, DateTime, or Time values to the specified precision to determine whether the first argument is the before the second argument. The comparison is performed by considering each precision in order, beginning with years (or hours for time values). If the values are the same, comparison proceeds to the next precision; if the first value is less than the second, the result is true; if the first value is greater than the second, the result is false; if either input has no value for the precision, the comparison stops and the result is null; if the specified precision has been reached, the comparison stops and the result is false.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.date	Date and Time Operators date	The Date operator constructs a date value from the given components.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.datetime	Date and Time Operators datetime	The DateTime operator constructs a DateTime value from the given components.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.from	Date and Time Operators from	The component-from operator returns the specified component of the argument.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.difference	Date and Time Operators difference	The difference-between operator returns the number of boundaries crossed for the specified precision between the first and second arguments. If the first argument is after the second argument, the result is negative. The result of this operation is always an integer; any fractional boundaries are dropped.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.duration	Date and Time Operators duration	The duration-between operator returns the number of whole calendar periods for the specified precision between the first and second arguments. If the first argument is after the second argument, the result is negative. The result of this operation is always an integer; any fractional periods are dropped.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.now	Date and Time Operators now	The Now operator returns the date and time of the start timestamp associated with the evaluation request.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.on-or-after	Date and Time Operators on or after	The on or after operator for Date, DateTime, and Time values is a synonym for the same or after operator and is supported to enable natural phrasing. See the description of the Same Or After (Date, DateTime, or Time) operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.on-or-before	Date and Time Operators on or before	The on or before operator for Date, DateTime, and Time values is a synonym for the same or before operator and is supported to enable natural phrasing. See the description of the Same Or Before (Date, DateTime, or Time) operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.same-as	Date and Time Operators same as	The same-precision-as operator compares two Date, DateTime, or Time values to the specified precision for equality. The comparison is performed by considering each precision in order, beginning with years (or hours for time values). If the values are the same, comparison proceeds to the next precision; if the values are different, the comparison stops and the result is false; if either input has no value for the precision, the comparison stops and the result is null; if the specified precision has been reached, the comparison stops and the result is true.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.same-or-after	Date and Time Operators same or after	The same-precision-or after operator compares two Date, DateTime, or Time values to the specified precision to determine whether the first argument is the same or after the second argument. The comparison is performed by considering each precision in order, beginning with years (or hours for time values). If the values are the same, comparison proceeds to the next precision; if the first value is greater than the second, the result is true; if the first value is less than the second, the result is false; if either input has no value for the precision, the comparison stops and the result is null; if the specified precision has been reached, the comparison stops and the result is true.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.same-or-before	Date and Time Operators same or before	The same-precision-or before operator compares two Date, DateTime, or Time values to the specified precision to determine whether the first argument is the same or before the second argument. The comparison is performed by considering each precision in order, beginning with years (or hours for time values). If the values are the same, comparison proceeds to the next precision; if the first value is less than the second, the result is true; if the first value is greater than the second, the result is false; if either input has no value for the precision, the comparison stops and the result is null; if the specified precision has been reached, the comparison stops and the result is true.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.subtract	Date and Time Operators subtract	The subtract (-) operator returns the value of the given Date, DateTime, or Time, decremented by the time-valued quantity, respecting variable length periods for calendar years and months.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.time	Date and Time Operators time	The Time operator constructs a time value from the given components.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.timeofday	Date and Time Operators timeofday	The TimeOfDay operator returns the time of day of the start timestamp associated with the evaluation request. See the Now operator for more information on the rationale for defining the TimeOfDay operator in this way.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	date-and-time-operators.today	Date and Time Operators today	The Today operator returns the date of the start timestamp associated with the evaluation request. See the Now operator for more information on the rationale for defining the Today operator in this way.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators	Interval Operators	contains, in, union, intersect, width, expand, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.after	Interval Operators after	The after operator for intervals returns true if the first interval starts after the second one ends. In other words, if the starting point of the first interval is greater than the ending point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.before	Interval Operators before	The before operator for intervals returns true if the first interval ends before the second one starts. In other words, if the ending point of the first interval is less than the starting point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.collapse	Interval Operators collapse	The collapse operator returns the unique set of intervals that completely covers the ranges present in the given list of intervals. In other words, adjacent intervals within a sorted list are merged if they either overlap or meet.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.contains	Interval Operators contains	The contains operator for intervals returns true if the given point is equal to the starting or ending point of the interval, or greater than the starting point and less than the ending point. For open interval boundaries, exclusive comparison operators are used. For closed interval boundaries, if the interval boundary is null, the result of the boundary comparison is considered true.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.end	Interval Operators end	The End operator returns the ending point of an interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.ends	Interval Operators ends	The ends operator returns true if the first interval ends the second. More precisely, if the starting point of the first interval is greater than or equal to the starting point of the second, and the ending point of the first interval is equal to the ending point of the second.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.equal	Interval Operators equal	The equal (=) operator for intervals returns true if and only if the intervals are over the same point type, and they have the same value for the starting and ending points of the intervals as determined by the Start and End operators
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.equivalent	Interval Operators equivalent	The equivalent (~) operator for intervals returns true if and only if the intervals are over the same point type, and the starting and ending points of the intervals as determined by the Start and End operators are equivalent.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.except	Interval Operators except	The except operator for intervals returns the set difference of two intervals. More precisely, this operator returns the portion of the first interval that does not overlap with the second. Note that to avoid returning an improper interval, if the second argument is properly contained within the first and does not start or end it, this operator returns null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.expand	Interval Operators expand	The expand operator returns the set of intervals of size per for all the intervals in the input, or the list of points covering the range of the given interval, if invoked on a single interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.in	Interval Operators in	The in operator (can also be invoked using during) for intervals returns true if the given point is equal to the starting or ending point of the interval, or greater than the starting point and less than the ending point. For open interval boundaries, exclusive comparison operators are used. For closed interval boundaries, if the interval boundary is null, the result of the boundary comparison is considered true.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.includes	Interval Operators includes	The includes operator for intervals returns true if the first interval completely includes the second. More precisely, if the starting point of the first interval is less than or equal to the starting point of the second interval, and the ending point of the first interval is greater than or equal to the ending point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.included-in	Interval Operators included in	The included in (or during) operator for intervals returns true if the first interval is completely included in the second. More precisely, if the starting point of the first interval is greater than or equal to the starting point of the second interval, and the ending point of the first interval is less than or equal to the ending point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.intersect	Interval Operators intersect	The intersect operator for intervals returns the intersection of two intervals. More precisely, the operator returns the interval that defines the overlapping portion of both arguments. If the arguments do not overlap, this operator returns null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.meets	Interval Operators meets	The meets operator returns true if the first interval ends immediately before the second interval starts, or if the first interval starts immediately after the second interval ends. In other words, if the ending point of the first interval is equal to the predecessor of the starting point of the second, or if the starting point of the first interval is equal to the successor of the ending point of the second.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.not-equal	Interval Operators not equal	The not equal (!=) operator for intervals returns true if its arguments are not the same value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.not-equivalent	Interval Operators not equivalent	The not equivalent (!~) operator for intervals returns true if its arguments are not equivalent.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.on-or-after	Interval Operators on or after	The on or after operator for intervals is a synonym for the same or after operator and is supported to enable natural phrasing. See the description of the Same Or After (Intervals) operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.on-or-before	Interval Operators on or before	The on or before operator for Date-, DateTime-, or Time-based intervals is a synonym for the same or before operator and is supported to enable natural phrasing. See the description of the Same Or Before (Intervals) operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.overlaps	Interval Operators overlaps	The overlaps operator returns true if the first interval overlaps the second. More precisely, if the starting or ending point of either interval is in the other, or if the ending point of the first interval is greater than or equal to the starting point of the second interval, and the starting point of the first interval is less than or equal to the ending point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.point-from	Interval Operators point from	The point from operator extracts the single point from a unit interval. If the argument is not a unit interval, a run-time error is thrown.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.properly-includes	Interval Operators properly includes	The properly includes operator for intervals returns true if the first interval completely includes the second and the first interval is strictly larger than the second. More precisely, if the starting point of the first interval is less than or equal to the starting point of the second interval, and the ending point of the first interval is greater than or equal to the ending point of the second interval, and they are not the same interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.properly-included-in	Interval Operators properly included in	The properly included in (or properly during) operator for intervals returns true if the first interval is completely included in the second and the first interval is strictly smaller than the second. More precisely, if the starting point of the first interval is greater than or equal to the starting point of the second interval, and the ending point of the first interval is less than or equal to the ending point of the second interval, and they are not the same interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.same-as	Interval Operators same as	The same-precision-as operator for intervals returns true if the two intervals start and end at the same value, using the semantics described in the Start and End operators to determine interval boundaries, and for Date, DateTime, or Time value, performing the comparisons at the specified precision, as described in the Same As operator for Date, DateTime, or Time values.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.same-or-after	Interval Operators same or after	The same-precision-or after operator for intervals returns true if the first interval starts on or after the second one ends, using the semantics described in the Start and End operators to determine interval boundaries, and for Date, DateTime, or Time values, performing the comparisons at the specified precision, as described in the Same or After (Date, DateTime, or Time) operator for Date, DateTime, or Time values.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.same-or-before	Interval Operators same or before	The same-precision-or before operator returns true if the first interval ends on or before the second one starts, using the semantics described in the Start and End operators to determine interval boundaries, and for Date, DateTime, or Time values, performing the comparisons at the specified precision, as described in the Same or Before (Date, DateTime, or Time) operator for Date, DateTime, or Time values.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.size	Interval Operators size	The Size operator returns the size of an interval. The result of this operator is equivalent to invoking: (end of argument – start of argument) + point-size, where point-size is determined by successor of minimum T - minimum T.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.start	Interval Operators start	The Start operator returns the starting point of an interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.starts	Interval Operators starts	The starts operator returns true if the first interval starts the second. More precisely, if the starting point of the first is equal to the starting point of the second interval and the ending point of the first interval is less than or equal to the ending point of the second interval.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.union	Interval Operators union	The union operator for intervals returns the union of the intervals. More precisely, the operator returns the interval that starts at the earliest starting point in either argument, and ends at the latest starting point in either argument. If the arguments do not overlap or meet, this operator returns null.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval-operators.width	Interval Operators width	The width operator returns the width of an interval. The result of this operator is equivalent to invoking: (end of argument – start of argument).
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators	List Operators	size, first/last, contains, union/intersect/except, map/filter/distinct, sort/reverse/zip, etc.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.contains	List Operators contains	The contains operator for lists returns true if the given element is in the list using equality semantics, with the exception that null elements are considered equal.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.distinct	List Operators distinct	The distinct operator returns the given list with duplicates eliminated using equality semantics.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.equal	List Operators equal	The equal (=) operator for lists returns true if and only if the lists have the same element type, and have the same elements by value, in the same order.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.equivalent	List Operators equivalent	The equivalent (~) operator for lists returns true if and only if the lists contain elements of the same type, have the same number of elements, and for each element in the lists, in order, the elements are equivalent.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.except	List Operators except	The except operator returns the set difference of two lists. More precisely, the operator returns a list with the elements that appear in the first operand that do not appear in the second operand.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.exists	List Operators exists	The exists operator returns true if the list contains any non-null elements.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.flatten	List Operators flatten	The flatten operator flattens a list of lists into a single list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.first	List Operators first	The First operator returns the first element in a list. The operator is equivalent to invoking the indexer with an index of 0.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.in	List Operators in	The in operator for lists returns true if the given element is in the given list using equality semantics, with the exception that null elements are considered equal.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.includes	List Operators includes	The includes operator for lists returns true if the first list contains every element of the second list using equality semantics, with the exception that null elements are considered equal.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.included_in	List Operators included in	The included in operator for lists returns true if every element of the first list is in the second list using equality semantics.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.indexer	List Operators indexer	The indexer ([]) operator returns the element at the indexth position in a list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.indexof	List Operators IndexOf	The IndexOf operator returns the 0-based index of the given element in the given source list using equality semantics, with the exception that nulls are considered equal.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.intersect	List Operators intersect	The intersect operator for lists returns the intersection of two lists. More precisely, the operator returns a list containing only the elements that appear in both lists.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.last	List Operators last	The Last operator returns the last element in a list. In a list of length N, the operator is equivalent to invoking the indexer with an index of N - 1
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.length	List Operators length	The Length operator returns the number of elements in a list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.not_equal	List Operators not equal	The not equal (!=) operator for lists returns true if its arguments are not the same value.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.not_equivalent	List Operators not equivalent	The not equivalent (!~) operator for lists returns true if its arguments are not equivalent.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.properly_includes	List Operators properly includes	The properly includes operator for lists returns true if the first list contains every element of the second list, and the first list is strictly larger than the second list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.properly_included_in	List Operators properly included in	The properly included in operator for lists returns true if every element of the first list is in the second list and the first list is strictly smaller than the second list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.singleton_from	List Operators singleton from	The singleton from operator extracts a single element from the source list. If the source list is empty, the result is null. If the source list contains one element, that element is returned. If the list contains more than one element, a run-time error is thrown.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.skip	List Operators skip	The Skip operator returns the elements in the list, skipping the first number elements. If the list has less number elements, the result is empty.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.tail	List Operators tail	The Tail operator returns all but the first element from the given list. If the list is empty, the result is empty.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.take	List Operators take	The Take operator returns the first number elements from the given list. If the list has less than number elements, the result only contains the elements in the list.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list-operators.union	List Operators union	The union operator for lists returns a list with all unique elements from both arguments.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	aggregate-functions	Aggregate Functions	count, sum, min, max, average, median, mode, etc.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators	Clinical Operators	Retrieve/terminology functions; temporal/duration in clinical context.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.age	Clinical Operators age	The Age operators calculate the age of the patient as of the current date in the precision named in the operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.ageat	Clinical Operators age at	The AgeAt operators calculate the age of the patient as of a given date and in the precision named in the operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.calculateage	Clinical Operators calculate age	The CalculateAge operators calculate the age of a person born on the given birth date, as of the current date, and in the precision named in the operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.calculateageat	Clinical Operators Calculate age at	The CalculateAgeAt operators calculate the age of a person born on the given birth date as of the given date, and in the precision named in the operator.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.contains_codesystem	Clinical Operators contains codesystem	The ~contains (Codesystem) operators determine whether or not a given code, or any of a list of codes, is in a particular codesystem. Note that these operators can only be invoked by referencing a defined codesystem or CodeSystem-valued expression.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.contains_valueset	Clinical Operators contains valueset	The ~contains (Valueset) operators determine whether or not a given code, or any of a list of codes, is in a particular valueset. Note that these operators can only be invoked by referencing a defined valueset or ValueSet-valued expression.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.equal	Clinical Operators equal	The equal (=) operator for Codes and Concepts uses tuple equality semantics. This means that the operator will return true if and only if the values for each element by name are equal.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.equivalent	Clinical Operators equivalent	The equivalent (~) operator for Code values returns true if the code and system elements are equivalent. The version and display elements are ignored for the purposes of determining Code equivalence.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.in-codesysterm	Clinical Operators in (Codesystem)	The in (Codesystem) operators determine whether or not a given code, or any of a list of codes, is in a particular codesystem. Note that these operators can only be invoked by referencing a defined codesystem.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.expandvalueset	Clinical Operators expand valueset	The ExpandValueSet function returns the current expansion for the given value set.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	clinical-operators.in_valueset	Clinical Operators in valueset	The in (Valueset) operators determine whether or not a given code, or any of a list of codes, is in a particular valueset. Note that these operators can only be invoked by referencing a defined valueset.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	diagnostic-operators	Diagnostic Operators	Errors and messaging functions.
2	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	diagnostic-operators.message	Diagnostic Operators message	The Message operator provides a run-time mechanism for returning messages, warnings, traces, and errors to the calling environment.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	single-source-query	Single source query	Query over one source.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	relationships-query	Relationships query	Query involving two or more sources.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	let-clause-query	Let clause query	Introduce local bindings.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	where-clause-query	Where clause query	Filter using Boolean conditions.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	return-clause-query	Return clause query	Specify the shape/content of returned rows.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	aggregate-clause-query	Aggregate clause query	Reduce rows to a summary value.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	multi-source-query	Multi source query	Query using two or more sources.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	unfiltered-context-retrieve	Unfiltered context retrieve	All data of a type in the current context.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	terminology-based-retrieve	Terminology-based retrieve	Retrieve filtered by ValueSet/CodeSystem/Code.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	valueset-terminology-target-retrieve	Valueset terminology target retrieve	Retrieve filtered by a ValueSet reference.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	codesystem-terminology-target-retrieve	CodeSystem terminology target retrieve	Retrieve filtered by a CodeSystem.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	code-terminology-target-retrieve	Code terminology target retrieve	Retrieve filtered by a single Code.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	searchpath-retrieve	Searchpath retrieve	Retrieve using a search path expression.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	include-retrieve	Include retrieve	Retrieve that includes related records via references.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	related-context-retrieve	Related-context retrieve	Retrieve scoped to a related context entity.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	profile-based-retrieve	Profile-based retrieve	Retrieve constrained to a profile.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	tuple	Tuple	Structured type with named elements.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	choice	Choice	Value that may be one of several specified types.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	list<T>	List<T>	Ordered collection of elements of type T.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<T>	Interval<T>	Range of values of type T.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<integer>	Interval<Integer>	Range of integers.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<decimal>	Interval<Decimal>	Range of decimal numbers.
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<date>	Interval<Date>	Range of dates (no time).
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<time>	Interval<Time>	Range of times of day (no date).
1	`http://cql.hl7.org/CodeSystem/cql-language-capabilities`	interval<datetime>	Interval<DateTime>	Range of full date/times.

Explanation of the columns that may appear on this page:

Level

A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies

System

The source of the definition of the code (when the value set draws in codes defined elsewhere)

Code

The code (used as the code in the resource instance)

Display

The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application

Definition

An explanation of the meaning of the concept

Comments

Additional notes about how to use the code