---
license: apache-2.0
pretty_name: Xet Protocol Reference Files
---

The files in this repository are intended to provide a reference to content processed using the xet protocol, relative to the original file: `Electric_Vehicle_Population_Data_20250917.csv`

> The original file was exported from <https://data.wa.gov/Transportation/Electric-Vehicle-Population-Data/f6w7-q2d2/about_data> on September 16, 2025.

The contents are as described:

- `Electric_Vehicle_Population_Data_20250917.csv` - the original file

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- `Electric_Vehicle_Population_Data_20250917.csv.chunks` - a list of the chunk hashes and lengths in order when processing the file using the chunking algorithm
  - The chunk lengths can be used to verify that a chunker implementation is producing correct chunk boundaries.
  - The hashes can be used to verify that an hasher implementation is computing hashes correctly given the listed chunk lengths.
- `Electric_Vehicle_Population_Data_20250917.csv.xet-file-hash` - contains the result file hash in string format (`118a53328412787fee04011dcf82fdc4acf3a4a1eddec341c910d30a306aaf97`).

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- `Electric_Vehicle_Population_Data_20250917.csv.xet-xorb-hash` - contains the xorb hash `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` that is the xorb that contains all the chunks that make up the file `Electric_Vehicle_Population_Data_20250917.csv`
- `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632.xorb` - contains the serialized contents of the xorb with hash `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` that contains all of the chunks for the file `Electric_Vehicle_Population_Data_20250917.csv`
  - The metadata for this file can be viewed on the [Xet Object Viewer](https://huggingface.co/spaces/assafvayner/xet-object-viewer) app
- `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632.xorb.chunks` - a list of the chunk hashes and lengths in xorb `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632`.
  - The chunks in this file are the same chunks in the same order as listed in `Electric_Vehicle_Population_Data_20250917.csv.chunks`
- `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632.xorb.range-hash` - contains the range verification hash computed for all the chunks in xorb `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` (its chunks are listed in the file `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632.xorb.chunks`)

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- `b10aa1dc71c61661de92280c41a188aabc47981739b785724a099945d8dc5ce4.chunk` - the first chunk data out of `Electric_Vehicle_Population_Data_20250917.csv.chunks`; the chunk hash in string format for this chunk is `b10aa1dc71c61661de92280c41a188aabc47981739b785724a099945d8dc5ce4`
- `26255591fa803b6baf25d88c315b8a6f5153d5bcfdf18ec5ef526264e0ccc907.chunk` - the first chunk data out of `Electric_Vehicle_Population_Data_20250917.csv.chunks`; the chunk hash in string format for this chunk is `26255591fa803b6baf25d88c315b8a6f5153d5bcfdf18ec5ef526264e0ccc907`
- `099cb228194fe640e36a6c7d274ee5ed3a714ccd557a0951d9b6b43a7292b5d1.chunk` - the first chunk data out of `Electric_Vehicle_Population_Data_20250917.csv.chunks`; the chunk hash in string format for this chunk is `099cb228194fe640e36a6c7d274ee5ed3a714ccd557a0951d9b6b43a7292b5d1`

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- `Electric_Vehicle_Population_Data_20250917.csv.shard` - a serialized shard file containing the reconstruction of `Electric_Vehicle_Population_Data_20250917.csv` in its File Info section and listing xorb `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` in its CAS Info Section.
  - Note that in this shard the range verification hashes are not included.
  - This version of the shard should not be used with API, it serves as a base only.
- `Electric_Vehicle_Population_Data_20250917.csv.shard.verification` - This shard contains the file reconstruction information for the file `Electric_Vehicle_Population_Data_20250917.csv` with file hash `118a53328412787fee04011dcf82fdc4acf3a4a1eddec341c910d30a306aaf97` and the metadata for xorb `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` in its CAS Info Section.
  - This shard does contain the range verification hashes matching each segment.
  - To make this shard uploadable, the footer should be truncated.
- `Electric_Vehicle_Population_Data_20250917.csv.shard.verification-no-footer` - `Electric_Vehicle_Population_Data_20250917.csv.shard.verification` with the footer truncated.
  - This file cannot be viewed in the shard viewer app (the app requires parsing the footer).
  - This is the version of the shard that should be used when uploading the shard to register the file upload, it includes the verification segments, but no footer.
- `Electric_Vehicle_Population_Data_20250917.csv.shard.dedupe` - a serialized shard file containing the xorb `eea25d6ee393ccae385820daed127b96ef0ea034dfb7cf6da3a950ce334b7632` as if it were a response to a global dedupe query for a chunk in it.
  - There is no file info contents in this shard
  - All the chunk hashes listed in the CAS info section were HMAC'd with the HMAC key specified in the shard footer (hash in string form: "1234567812345678123456781234567812345678123456781234567812345678")
  -  
> All but the footer-less shard file can be displayed in the [Xet Object Viewer](https://huggingface.co/spaces/assafvayner/xet-object-viewer) app