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:

https://community.sophos.com/kb/en-us/135466

 

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.