第一个段落或表行被视为标题记录，因而不包含在排序范围内。
The first paragraph or table row is considered a header record and is not included in the sort.
这种加上标题记录的文件格式可以让读者知道这一系列记录的起始和结束。
The use of a file format that includes header records enables one to determine where the series begin and end.
当数个实体记录必须要包含某个特定变项，而这个变项并非定值的时候，就会使用标题记录。
Header records are often used when the number of physical records needed to contain the data for a particular variable is not constant for all variables.
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