object PersonDatabase
    components: PersonRecord*;
    operations: AddRecord, DeleteRecord, FindRecord, CreateDatabase;

    description: (*
        A PersonDatabase contains zero or more personal information
        records.
    *);
end PersonDatabase;

object PersonRecord
    components: Name and Age and Address;
    description: (*
        A PersonRecord contains the information items for an
        individual in the PersonDatabase.
    *);
end PersonRecord;

object Name =  string;
object Age =  number;
object Address =  string;