The value of Context Identifier (0008,010F) identifies the Context Group defined by Mapping Resource (0008,0105) from which the values of Code Value (0008,0100) and Code Meaning (0008,0104) were selected , or to which the Code Value (0008,0100) and Code Meaning (0008,0104) have been added as a private Context Group extension (see Section 8.7). The Context Identifier Attribute uses VR CS, and for Context Groups defined in PS3.16 the value shall be the Context Group Identifier as a string of digits without leading zeros, and does not include the string “CID”.
The value of Context UID (0008,0117) uniquely identifies the Context Group. See PS 3.6.
Note: Privately defined Context Groups are not identified by Context Identifier and Mapping Resource.