I don’t know what CKM you’re referring to? But never mind:) As shared in this post I think the value is in generating code from templates on compositions. Technically just adls (in adl2) so it may not matter for code generation.
Some good example opts:
p.s. Please don’t hesitate to ask for help if you would be struggling to understand compositions. It may help to view it as the smallest unit of commit to the CDR. Data not recorded as part of a composition has too little meaning:)