The DSC file extension is related to the Tag descriptor file format.
DSC file extension - Tag descriptor file
What is dsc file? How to open dsc files?
File type specification:
The DSC file extension is used for Tag descriptor file format.
The format is intended to deal with sending a number of elements where each element has common attributes - possible applications include descriptions of books, financial transactions, recipes etc. Many of these things are exchanged in tag-like formats already, but all would benefit from using the same overall structure. Different applications can use different fields but there are core applications which can operate on any tagged type.