Inventory Transaction History JI Code


Hoping someone can help. Couldn't find much online and the online resource file layout mentioned the code but no definition on what this code represents. Since upgrading to Sage 100 2022 I am seeing JI codes in inventory transaction history. Those codes reference work tickets so I assume its on the work ticket side but can someone please let me know what these transaction codes JI represent. 


Also, is there a resource that I missed that explains the database value definitions other than just listing the possible codes.