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RTRDataSchemeBuilder protocol

The protocol for a scheme builder object which lets you add fields to the scheme.

 Note: Currently, only one scheme may exist in the profile, and only one field may be defined in the scheme.




- addField:

Adds a new field.

The rules to which the data should conform may be specified in the input parameters of this method or later via the field builder object.

- setName:  Sets the scheme name.