Structure data types have no literal type character or identifier type character. 结构数据类型没有文本类型字符或标识符类型字符。
The text we care about may contain configuration data, commands to control or define processes, documents for human consumption, or even tabular data. 我们所关心的包含了结构数据控制命令和定义处理，甚至是制表符。
