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2. the values of the fields may be a reference to the element of another directory.the use of references in the field of one of the other guide defines the relationship between the guides of.3. the exception and the minimization of (where there is an overlap of the same information from different dictionaries.4. each directory contains mandatory fields of [code], [name], and a [link].field [code] is the key, that is. uniquely identifies a record book. values of fields [code] are unique within a database.[name] defines a uniform field of the record, which will be used in all processes of society using the ud.the [link] defines a direct "родителя» records handbook". establishes the hierarchical structure of the repertoire, as described in paragraph 1.5. the flexibility of the model guides the ud.the structure of the target directory allows you to add new records, while maintaining a specified relationship and rules of the guides. this model provides flexibility in changing business requirements.the implementation of this principle is possible only in accordance with the principles described above in para. 1 - 4.
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