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Minor clarification of ExtID with zero length #17

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Minor clarification of ExtID with zero length #17

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2 changes: 1 addition & 1 deletion factomDataStructureDetails.md
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Expand Up @@ -52,7 +52,7 @@ External IDs and Content is not checked for validity, or sanitized, as it is onl
| 2 bytes | ExtIDs Size | Describes how many bytes required for the set of External IDs for this Entry. Must be less than or equal to the Payload size. Big endian. |
| **Payload** | | This is the data between the end of the Header and the end of the Content. |
| **External IDs** | | This section is only interpreted and enforced if the External ID Size is greater than zero. |
| 2 bytes | ExtID element 0 length | This is the number of the following bytes to be interpreted as an External ID element. Cannot be 0 length. |
| 2 bytes | ExtID element 0 length | This is the number of the following bytes to be interpreted as an External ID element. Can be 0 length. |
| variable | ExtID 0 | This is the data for the first External ID. |
| 2 bytes | ExtID X | Size of the X External ID |
| variable | ExtID X data | This is the Xth element. The last byte of the last element must fall on the last byte specified ExtIDs Size in the header. |
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