DOC: Fix v3 spec typo in "operation for retrieving chunk data" section.

[zoj613]

In the core v3 spec, in the Retrieve chunk data in an array subsection of the Storage section, the operation used to demonstrate retrieval of chunk data is incorrect. It should be get(data_key(P, j, i, ...)) instead of get(data_key(P, j, i, ...), value).

[d-v-b]

good catch, thank you @zoj613

[zoj613]

good catch, thank you @zoj613

Btw, I'm currently working on implementing the v3 spec for the Ocaml language so i'm doing a lot of reading. Is there any other resource I can use to make the process a little easier? Maybe those who implemented the spec in other languages have written up about their experience and challenges that I can learn from?

[d-v-b]

Btw, I'm currently working on implementing the v3 spec for the Ocaml language so i'm doing a lot of reading.

This is super cool! Since you are probably concerned about having nice types, you may have noticed that while the spec defines metadata documents for groups and arrays, it does not define a data structure / type for a Zarr hierarchy (i.e., a tree of groups + arrays). We attempt to define such a type here: zarr-developers/zeps#46.

Is there any other resource I can use to make the process a little easier? Maybe those who implemented the spec in other languages have written up about their experience and challenges that I can learn from?

I'm not aware of formal writeups, but our regular community meetings often have a mix of implementation authors present (e.g., python and c++, sometimes C and Java). That might be the place to ask, provided the time zone works for you.

[joshmoore]

@zoj613: thanks for the fix! Looking forward to seeing your Ocaml work listed on https://zarr.dev/implementations/ 😄

[zoj613]

@zoj613: thanks for the fix! Looking forward to seeing your Ocaml work listed on zarr.dev/implementations 😄

@joshmoore @d-v-b Looks like I managed to pull it off quicker than I thought. See this PR: zoj613/zarr-ml#1
Also see the readme for a basic usage example: https://github.com/zoj613/zarr-ml/blob/main/README.md

Its still a work in progress since I need to still add tests, support concurrent IO, and also squeeze out performance where necessary.

[sanketverma1704]

This is great, @zoj613! Congratulations!

Two things:

• Would you like to add a PR to add your implementations at zarr.dev/implementations? (Just need to edit this file)
• We're holding showcase presentations for 5-10 minutes at our community meetings. Would you like to join one of them and tell the community about your work? (The calendar, notes and all necessary info for community meetings are: https://zarr.dev/community-calls)

[zoj613]

This is great, @zoj613! Congratulations!

Two things:

• Would you like to add a PR to add your implementations at zarr.dev/implementations? (Just need to edit this file)
• We're holding showcase presentations for 5-10 minutes at our community meetings. Would you like to join one of them and tell the community about your work? (The calendar, notes and all necessary info for community meetings are: zarr.dev/community-calls)https://github.com/zarr-developers/zarr-developers.github.io/pull/115/files

Thanks for the reply. I'd be happy to join one of the community meetings to talk about zarr-ml. I'll see which slot I can choose. In the meantime I opened a PR as you suggested. See: zarr-developers/zarr-developers.github.io#115

[sanketverma1704]

Thanks, @zoj613!
Sure. Let us know when you'd like to present.