The database schema is a model of the structure of the database. Several comical tools are available to graphically develop and maintain a database schema. The farm is organized into production blocks, each having a unique block number. Each operation is performed on a particular block on a specific date. Irrigation operations are recorded using the amount of water applied.
Pesticides have pest controlled, product, and amount per acre.
Final database schema will look like this. Once the database schema is designed, Persistent Java class definitions of the schema can be automatically generated. The Java applet must initialize an ObjectStore session and open a database file for storing instances of the persistent classes. Each operation involving persistent classes must be contained inside a transaction. A root is an object in the database which can be retrieved by a unique name.