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There are variations on this pattern for certain entities, but this description is generally applicable in this data model. Note that the default types for the data model are defined in ofbiz/commonapp/entitydef/datamodel-data.sql.

Common

----The Common package is meant to contain entities that are for general use and may be used by entities in many other packages.
common.geo  

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Uom UomType UomConversion

Party

---- The Party package is meant to contain entities related to the Party entity. There are many types of parties, and a lot of data that is associated with a party or with parties, and that data is defined in this package. Parties include persons, organizations, and so forth.
party.party  

Party PartyClassification PartyClassificationType PartyType PartyAttribute PartyTypeAttr PartyRole RoleType RoleTypeAttr PartyRelationship PriorityType PartyRelationshipType Customer PartyDataObject Person

Product

---- The Product package is meant to contain entities related to the Product entity. There are many types of products, and a lot of data that is associated with a product or with products, and that data is defined in this package. A Product can be a good or a service, and each may have various subtypes. Some related data that is fairly central to Product definitions includes features and categories. The Category package allows products to be organized, and the Feature package describes details of a product that may be used for pricing or in a parametric product search.
The Product package also contains information about serialized and non-serialized inventory items, and the storage of inventory in facilities which can be warehouses, stores, or whatever. There is a package for Product cost estimation, and another for Product price calculation. In addition there is a package for Product supplier related information to keep track of where a product might come from and to rate and put a priority on different suppliers of the same product.

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ReorderGuideline SupplierProduct SupplierRatingType SupplierPrefOrder MarketInterest

Security

---- The Security package contains entities related to controlling access to various parts of applications that use the data model. The Login package has a UserLogin entity which contains the usernames and passwords of all users on the system and which is optionally related to a Party entity instance. The Login package also has an entity which keeps a history of logins into the system.
The SecurityGroup package contains entities used to map SecurityPermissions to UserLogins. It goes this by mapping a UserLogin to a SecurityGroup and then mapping the SecurityGroup to a SecurityPermission. In this manner complex security definitions can be shared efficiently.

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