The following table provides default information about the Command Elements contained in the N-ACTION-REQUEST Command Set.
In the column headings the following abbreviations apply:
VR = Value Representation
VM = Value Multiplicity
In the Usage column the following abbreviations apply:
U = Use is a service user option.
C = Conditional
M = Mandatory
For more information about Value Representations, refer to Default Value Representation Table.
To see a list of the default tag constants for the command sets data elements, refer to Data Element Tag Constants for the Command Sets
Tag  | 
Name  | 
VR  | 
VM  | 
Usage  | 
0x00000003  | 
Requested SOP Class UID  | 
UI  | 
1  | 
M  | 
0x00000100  | 
Command Field  | 
US  | 
1  | 
0x0130  | 
0x00000110  | 
Message ID  | 
US  | 
1  | 
M  | 
0x00000800  | 
Data Set Type  | 
US  | 
1  | 
COMMAND_DATASET_PRESENT or COMMAND_DATASET_ABSENT  | 
0x00001001  | 
Requested SOP Instance UID  | 
UI  | 
1  | 
M  | 
0x00001008  | 
Action Type ID  | 
US  | 
1  | 
M  | 
Data Set  | 
Action Information - Application-specific Data Set containing additional information related to the operation  | 
  | 
  | 
U  | 
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