anchor.diff:            "Purpose of Reference Code Sequence", VR.kSQ, VM.k1, false);
     static const Tag kObservationUID
         //(0040,A171)
  -      = const Tag.public("ObservationUID", 0x0040A171, "Observation UID", VR.kUI,
  -          VM.k1, false);
  +      = const Tag.public("ObservationUID", 0x0040A171, "Observation UID",
  +          VR.kUI, VM.k1, false);
     static const Tag kReferencedObservationUIDTrial
         //(0040,A172)
         = const Tag.public("ReferencedObservationUIDTrial", 0x0040A172,
  
positive.code:           "Certified Timestamp Type", VR.kCS, VM.k1, false);
    static const Tag kCertifiedTimestamp
        //(0400,0310)
        = const Tag.public("CertifiedTimestamp", 0x04000310, "Certified Timestamp",
            VR.kOB, VM.k1, false);
    static const Tag kDigitalSignaturePurposeCodeSequence
        //(0400,0401)
        = const Tag.public("DigitalSignaturePurposeCodeSequence", 0x04000401,
  
negative.code:           "OverlayRows", 0x60000010, "Overlay Rows", VR.kUS, VM.k1, false);
    static const Tag kOverlayColumns
        //(6000,0011)
        = const Tag.public("OverlayColumns", 0x60000011, "Overlay Columns",
            VR.kUS, VM.k1, false);
    static const Tag kOverlayPlanes
        //(6000,0012)
        = const Tag.public(
  