一般来说，没有规定格式的文本在查询时会引起麻烦。

As a general rule, character fields that are free-form text call for trouble when they are used for searches.

youdao

这些文件的内容应按照规定格式要求输入，具体要求如下。

Contents of these files should be inputted as per format requirement specified, detailed requirements are as follows.

youdao

规定格式的问题在于你是在假定你定义的格式它恰恰就是那个能够在任何情况下都适用的格式。

The problem with spec'ing a format is that you then assume you are "the one".

youdao