In general, the transport defines a message structure comprising a header and a body.

总体来说，传输定义了一个包含头部和体部的消息结构。

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The header contains general block information, such as the block address and the type of segment (for example, data or index).

块首部包涵了一般的块信息，这些信息包涵诸如块地址以及段的类型（比如，数据或者索引）等。

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The header contains general block information, such as the block address and the type of segment (for example, data or index).

数据块的这部分包涵了关于数据块中拥有行的表的信息。

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