In the creation of a database, a data model and integrity constraints can create certainty in the structure and content of the data. But how do you enforce that kind of control when your data is just text in hand-editable files? Fortunately, validating files and documents can ensure that data fits constraints.

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在創建數據庫時,數據模型和完整性約束能夠在數據的結構和內容上形成確定性。但是,在你數據只是可以手工編輯文件中的文本時,你怎樣實施這樣的控制呢?幸運的是,有效確認的文件和文檔能夠保證你的數據符合約束性的要求。