Structured Assurance Case Metamodel (SACM)
SACM is a publicly available specification published by Object Management Group (OMG). This specification defines a metamodel for representing structured assurance cases. An Assurance Case is a set of auditable claims, arguments, and evidence created to support the claim that a defined system/service will satisfy the particular requirements.
KDM Analytics products leverage the SACM specification.
You can access the full spec here: https://www.omg.org/spec/SACM/2.1/PDF