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The model related classes are important in that they define a databases structure. Giving GDL2 a way to map a relational database into a set of objects.
| • EOModel class | EOModel | |
| • EOEntity class | EOEntity | |
| • EOAttribute class | EOAttribute | |
| • EORelationship class | EORelationship | |
| • EOModelGroup class | EOModelGroup |
The database specific classes loadable through bundles provide a method for GDL2 to connect to and abstract implementation details between different database implementations.
Currently adaptors for SQLite3 and PostgreSQL exist.
| • EOAdaptor class | EOAdaptor | |
| • EOAdaptorChannel class | EOAdaptorChannel | |
| • EOAdaptorContext class | EOAdaptorContext |
The data oriented classes relate to actual data manipulation and management.
| • EODataSource class | EODataSource | |
| • EOEditingContext class | EOEditingContext | |
| • EOGenericRecord class | EOGenericRecord |