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# Concept: Block

A IPLD Block is a CID and the binary data value for that CID.

The short version:

+-----+--------------------------------+
| CID | Data                           |
+-----+--------------------------------+

The long version:

+-----------------------------------+------------------+
| CID                               | Binary Data      |
| +------------------------------+  |                  |
| |Codec                         |  |                  |
| +------------------------------+  |                  |
| |Multihash                     |  |                  |
| | +----------+---------------+ |  |                  |
| | |Hash Type | Hash Value    | |  |                  |
| | +----------+---------------+ |  |                  |
| |                              |  |                  |
| +------------------------------+  |                  |
|                                   |                  |
+-----------------------------------+------------------+