See PHI1232, which describes a reasonable use case for wanting information about the "draft" ("Hold as Draft / Do Not Auto-Promote") flag.

Also, flesh out "testPlan" and "summary". It's possible these "blob of remarkup" fields might have metadata some day (e.g., a rendered version or a list of PHIDs or something), but we could add more keys, and we already have some other transactions which work like this.

Used "transaction.search" to fetch these transaction types, saw type information and metadata.