Waht is the full form of DPSGN & use

Hi Team,


We have referring the some patch update document for sophos safegaurd & below is the Kb:



This KB includes some 
Resolved issues (new in File Encryption Engine build 32) column &  there is two column "Reference" & second column is " Symptom / Summary"



I just want to understad what is the exact meaning of like DPSGN.