This document provides an overview of the tables and relationships in an Oracle application that store party and relationship data. The key tables include HZ_PARTIES, HZ_ORGANIZATION_PROFILES, and HZ_RELATIONSHIPS, which store basic party, organization, and relationship information. Additional tables like HZ_CUST_ACCOUNTS, HZ_CUST_ACCT_SITES_ALL, and HZ_CUST_SITE_USES_ALL provide further details on customer accounts, sites, and their uses that are linked to parties.