Haso Keric very kindly created a help file (.CHM) of the data dictionary. Here’s a link to one of the threads where it can be downloaded: [ Download ] Epicor 10.2 & Kinetic .CHM Schema - #16 by hkeric.wci I just tested the link for 10.2.500 and it works… Searching for “chm” brings up a number of threads on the topic.
With the huge number of tables, fields, and relationships, a data relationship diagram would be unreadable. Last time I saw one was in 2003 (for Enterprise), and that one was incomplete yet still covered an entire wall of my office.