10.3.3.1 N-SET-RQ

The N-SET-RQ Message contains fields as defined in Table 10.3-5. Each field shall conform to DICOM encoding and Value Representation as defined in PS 3.5. Fields are required as specified in the N-SET service definition unless otherwise noted in Table 10.3-5. Fields not specified in the N-SET service definition but present in Table 10.3-5 are required by the DIMSE-N protocol.

Table 10.3-5 N-SET-RQ MESSAGE FIELDS

Message Field Tag VR VM Description of Field
Command Group Length (0000,0000) UL 1 The even number of bytes from the end of the value field to the beginning of the next group.
Requested SOP Class UID (0000,0003) UI 1 SOP Class UID of the SOP Instance for which Attribute values are to be modified.
Command Field (0000,0100) US 1 This field distinguishes the DIMSE-N operation conveyed by this Message. The value of this field shall be set to 0120H for the N-SET-RQ Message.
Message ID (0000,0110) US 1 Implementation-specific value which distinguishes this Message from other Messages.
Command Data Set Type (0000,0800) US 1 This field indicates that a Data Set is present in the Message. It shall be set to any value other than 0101H (Null).
Requested SOP Instance UID (0000,1001) UI 1 Contains the UID of the SOP Instance for which Attribute values are to be modified.
Modification List (no tag) This field is encoded as a Data Set. One Data Element is encoded for each Attribute and Attribute Value applicable to the operation.

Note: Τhe permitted contents of Modification List, encoded as a series of Data Elements, are defined in the Information Object Definition (PS 3.3) and Service Class Specifications (PS 3.4).