ReadonlynameThe word a claim begins with.
ReadonlynamedWhether a claim names one (feed 4599 status) or the subject is one thing (gather size).
ReadonlypropertiesThe properties it answers, each with how many words it takes before the comparison.
ReadonlyreadReads one property; asked only for a property it lists.
Something
expectcan make claims about. The core answerspath(exists,count); a backend registers its own world (ChRIS:gather,feed,run, andtagsonpath; stratus:cluster). Two subjects of one name are one subject whose properties are both of theirs: each answers its own.