Class

List Aggregate

Abstract intermediate. Reductions that take a list and yield a scalar (cardinality, sum, min, max). Subclasses add no extra properties — the difference is in the runner's reducer, not in authoring shape.

Class
Subclass Of
List-Sourced Expression

Referenced by

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ClassAverageReturns the arithmetic mean of `source` elements as an xsd:decimal. Result is always decimal — even when source elements are integer, average of [1, 2] yields…
ClassCountReturns the cardinality of `source` as an integer. Source elements are not inspected — every list element counts, regardless of type.
ClassMaxReturns the largest numeric element of `source`. Same numeric and empty-source contract as Min.
ClassMinReturns the smallest numeric element of `source`. Elements must be numeric. Empty source raises a runtime error (the minimum of the empty set is undefined;…
ClassSumReturns the numeric sum of `source` elements. Elements must be numeric (xsd:integer or xsd:decimal); non-numeric elements raise a runtime error. Empty source…