Defining a Database Using Non-SQL › Defining a Subschema

Defining a Subschema

The subschema copies its logical database definitions from the schema. You must define a valid schema and store it in the dictionary before you can create a subschema.

Order of Subschema Component Definition

When you add a new subschema to the dictionary, you must submit the ADD SUBSCHEMA statement first. Although you can add most statements in any order, cross references to nonexistent components generate error messages. To avoid error messages, submit statements in this order:

• SUBSCHEMA statement
• AREA statements
• RECORD statements
• SET statements
• LOGICAL RECORD statements
• PATH-GROUP statements
• VALIDATE statement
• GENERATE statement