Described in detail herein are systems and methods a data repository for an Electronic Document Interchange (EDI) system. A data repository management system can receive from a party system, at least one EDI document type, information associated with the third party system, a first set of data requests and a first set of data responses. The data repository management system can be operatively coupled to a data repository including a master self-referential table defining a hierarchy for the data repository. The data repository can further include a child table, a first sub-child table and a second sub-child table. The data repository management system can generate a rows in the master self-relational table, child table, first sub-child table and second sub-child table to store the information associated with the third party system and an associated EDI document.