Preparing files for water jet cutting

Hi Everyone,

Does anyone here use Draftsight for preparing files for water jet cutting. The water jet cutter that I will be using requires DXF files, and I am wondering if there are some special requirements in the files, like do the entities that make up one form need to be welded -if anyone has any tips or information that they could share I would appreciate it greatly!  

Thank you very much in advance.

Jacqueline