Introduction This schema defines the private attributes created by modality manufacturers or organizations other than the DICOM standard committee. Structure Overview Question mark "?" means optional items. Plus "+" means one or more items. Asterisk "*" means zero or more items. DICOM_PRIVATE_ATTRIBUTES DOCUMENT_HEADER? DOCUMENT_CHANGE_LOG* DOCUMENT_MODIFIER DOCUMENT_MODIFICATION_DATE DOCUMENT_VERSION? MODIFICATION_COMMENT? BASE_DOCUMENT? BASE_DOCUMENT_RELEASE_DATE? BASE_DOCUMENT_DESCRIPTION? ATTRIBUTE_DEFINERS? DEFINER+ NAME ID? PRIVATE_ATTRIBUTE_DEFINITION+ (TAG|TAG_RANGE) NAME DEFINER VR? VM? RETIRED? DOCUMENT_HEADER is an optional header to specify the modification history. See dt:DOCUMENT_HEADER_T for more information. ATTRIBUTE_DEFINERS specify the owner of each private attribute. See dt:ATTR_DEFINER_T for more information. A private dictionary contains one or more private attribute definitions. Each private attribute specification takes a tag specification, a name, a value representation type, a value multiplicity type, and a retired flag. See dt:VR_T dt:VM_T for the allowed values for the value representation and value multiplicity elements. Note: Private attribute tags allow three specification types. The tag can be a 4-byte hexadecimal number, a wildcard type such as "0039xx01", or a range type such as "0039xx01~0041xx01". Multiple attribute definitions cannot be associated with the same definer-tag pair in a dictionary. For example, a simple attribute definition ("oracle", 60100010) matches a wildcard attribute ("oracle", 60xx0010), they cannot coexist in the private dictionary. Similarly, a range attribute definition ("Oracle", {6000-60FF}) overlaps a range attribute definition ("Oracle", {6010-6020}), they cannot coexist in the private dictionary. As a rule, an attribute must not match two entries in the dictionary.