Friendly Enough Expression Language (FEEL)
Decision Model and Notation (DMN) defines a Friendly Enough Expression Language (FEEL). It can be used to evaluate expressions in a decision table.
Camunda BPM relies on an independently maintained project to provide FEEL support. You can find the documentation about the FEEL Language Reference in the FEEL Scala Engine Documentation (link to external documentation).
Please also check out the User Guide to learn more about the integration of the FEEL Scala Engine in Camunda BPM.