Mapping Transforms

Turn one set of values into another: a straight value-to-value lookup, or a multi-condition decision table.

lookup

Maps the input to a value from a table. If the input is not a key, returns default.

Field	Description
input	The value to look up (template allowed).
mapping	Object of `key: value` pairs. Values are templated.
default	Returned when the input matches no key.

decision

A rule table. Rules are tried in order; the first rule whose when clause matches every listed attribute wins and its then is returned. If none match, default is returned.

Field	Description
rules	Ordered list of `{ "when": {…}, "then": … }`.
when	Object of `attribute: expectedValue`. All entries must match. Comparison is exact and case-sensitive.
then	Value returned when the rule matches (templated).
default	Returned when no rule matches.