did some more checking on this.. the reason my location does not call this process of documenting whether a person with PTSD has depersonalization or derealization symptoms by the term subtyping is because that term is a stigmatizing \ stereotyping a person. think of it like saying everyone with PTSD will go out and shoot someone because one or two people with PTSD have in the past harmed others. here in my location we prefer to not stereotype a whole class of people in one package. (where as the term specify just means document whether a persons problems are of a dissociative nature and what that persons individual are...whether they are having depersonalization symptoms or whether they are having derealization symptoms and what are they. individualized according to each persons own symptoms.)