C = {
    IMPLEM_UID: '1.2.840.0.1.3680045.8.641',
    IMPLEM_VERSION: 'OHIF-DCM-0.1',
    APPLICATION_CONTEXT_NAME: '1.2.840.10008.3.1.1.1',
    PROTOCOL_VERSION: '0001',
    ITEM_TYPE_RESERVED: '00',
    ITEM_TYPE_APPLICATION_CONTEXT: '10',
    ITEM_TYPE_PDU_ASSOCIATE_RQ: '01',
    ITEM_TYPE_PDU_ASSOCIATE_AC: '02',
    ITEM_TYPE_PDU_PDATA: '04',
    ITEM_TYPE_PDU_RELEASE_RQ: '05',
    ITEM_TYPE_PDU_RELEASE_RP: '06',
    ITEM_TYPE_PDU_AABORT: '07',
    ITEM_TYPE_PRESENTATION_CONTEXT: '20',
    ITEM_TYPE_PRESENTATION_CONTEXT_AC: '21',
    ITEM_TYPE_ABSTRACT_CONTEXT: '30',
    ITEM_TYPE_TRANSFER_CONTEXT: '40',
    ITEM_TYPE_USER_INFORMATION: '50',
    ITEM_TYPE_MAXIMUM_LENGTH: '51',
    ITEM_TYPE_IMPLEMENTATION_UID: '52',
    ITEM_TYPE_IMPLEMENTATION_VERSION: '55',
    IMPLICIT_LITTLE_ENDIAN: '1.2.840.10008.1.2',
    EXPLICIT_LITTLE_ENDIAN: '1.2.840.10008.1.2.1',
    EXPLICIT_BIG_ENDIAN: '1.2.840.10008.1.2.2',
    SOP_PATIENT_ROOT_FIND: '1.2.840.10008.5.1.4.1.2.1.1',
    SOP_PATIENT_ROOT_MOVE: '1.2.840.10008.5.1.4.1.2.1.2',
    SOP_PATIENT_ROOT_GET: '1.2.840.10008.5.1.4.1.2.1.3',
    SOP_STUDY_ROOT_FIND: '1.2.840.10008.5.1.4.1.2.2.1',
    SOP_STUDY_ROOT_MOVE: '1.2.840.10008.5.1.4.1.2.2.2',
    SOP_STUDY_ROOT_GET: '1.2.840.10008.5.1.4.1.2.2.3',
    SOP_VERIFICATION: '1.2.840.10008.1.1',
    SOP_HANGING_PROTOCOL_FIND: '1.2.840.10008.5.1.4.38.2',
    SOP_MR_IMAGE_STORAGE: '1.2.840.10008.5.1.4.1.1.4',
    TYPE_ASCII: 1,
    TYPE_HEX: 2,
    TYPE_UINT8: 3,
    TYPE_UINT16: 4,
    TYPE_UINT32: 5,
    TYPE_COMPOSITE: 6,
    TYPE_FLOAT: 7,
    TYPE_DOUBLE: 8,
    TYPE_INT8: 9,
    TYPE_INT16: 10,
    TYPE_INT32: 11,  
    RESULT_REASON_ACCEPTANCE: 0,
    RESULT_REASON_USER_REJECTION: 1,
    RESULT_REASON_NO_REASON: 2,
    RESULT_REASON_ABSTRACT_NOT_SUPPORTED: 3,
    RESULT_REASON_TRANSFER_NOT_SUPPORTED: 4,
    DEFAULT_MESSAGE_ID: 1,
    LITTLE_ENDIAN: 1,
    BIG_ENDIAN: 2,
    VM_SINGLE: 1,
    VM_TWO: 3,
    VM_THREE: 4,
    VM_FOUR: 5,
    VM_1N: 6,
    VM_2N: 7,
    VM_3N: 8,
    VM_6N: 9,
    VM_3_3N: 10,
    VM_2_2N: 11,
    VM_16: 12,
    VM_1_2: 13,
    VM_1_3: 18,
    VM_SIX: 14,
    VM_NINE: 15,
    VM_1_32: 16,
    VM_1_99: 17,
    PRIORITY_LOW: 0x2,
    PRIORITY_MEDIUM: 0x0,
    PRIORITY_HIGH: 0x1,
    DATA_SET_PRESENT: 1,
    DATE_SET_ABSENCE: 0x0101,
    DATA_TYPE_COMMAND: 1,
    DATA_TYPE_DATA: 0,
    DATA_IS_LAST: 1,
    DATA_NOT_LAST: 0,
    SOURCE_SERVICE_USER: 0,
    SOURCE_SERVICE_PROVIDER: 2,
    QUERY_RETRIEVE_LEVEL_PATIENT: 'PATIENT',
    QUERY_RETRIEVE_LEVEL_STUDY: 'STUDY',
    QUERY_RETRIEVE_LEVEL_SERIES: 'SERIES',
    QUERY_RETRIEVE_LEVEL_IMAGE: 'IMAGE',
    VALUE_LENGTH_UNDEFINED: 0xffffffff,
    STATUS_SUCCESS: 0x0000,
    STATUS_CANCEL: 0xfe00,
    STATUS_CFIND_CONT_OK: 0xff00,
    STATUS_CFIND_CONT_WARN: 0xff01,
    COMMAND_C_GET_RSP: 0x8010,
    COMMAND_C_MOVE_RSP: 0x8021,
    COMMAND_C_GET_RQ: 0x10,
    COMMAND_C_STORE_RQ: 0x01,
    COMMAND_C_FIND_RSP: 0x8020,
    COMMAND_C_MOVE_RQ: 0x21,
    COMMAND_C_FIND_RQ: 0x20,
    COMMAND_C_STORE_RSP: 0x8001
};