inputs:
  records/participants:
    required@bool: yes
    record_type: address
    expand: owner_,customfields
    #default@csv: 1,2,3

The value should be an array of record IDs (123) or URIs (cerb:record_type:record_alias).

required:

record_type:

record types

default:

The default for the input if a value is omitted.

expand:

A comma-separated string or array of keys to expand in the record dictionaries.