The child is the character information item, meaning that the item contains alphanumerical characters.

子项是字符信息项，即包含字母数字字符的项。

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It includes sorting algorithms, developed by the author, for use with random alphanumerical and numerical data key fields.

它包括了排序算法，由作者开发的，可用于随机的文字数字和数字数据关键字。

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Passport number Passports have numerical or alphanumerical designators (" serial number ") assigned by the passport issuing authority.

护照号护照具有由护照颁发机构分配的数字或字母数字表示(“系列号”)。

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