# Dataset viewer not showing subsets?
**URL:**
**Author:**  [@drvenabili](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fdrvenabili)%5C
**Post date:** [September 24, 2025, 12:04pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F1 "2025-09-24T12:04:08Z")
Hi,
I’m encountering an issue I can’t find the solution to. I have created a dataset ( [iguanodon-ai/kubhist2 · Datasets at Hugging Face](https://huggingface.co/datasets/iguanodon-ai/kubhist2) ).
It has one split (train) but several configs, and for doing so I have followed the documentation here: [Structure your repository](https://huggingface.co/docs/datasets/repository_structure#configurations)
```auto
- config_name: '1710'
data_files:
- split: train
path: data/1710/train/*.parquet
- config_name: '1720'
data_files:
- split: train
path: data/1720/train/*.parquet
```
The structure is the same as this HF-released dataset ( [HuggingFaceFW/finepdfs at main](https://huggingface.co/datasets/HuggingFaceFW/finepdfs/tree/main) ).
The problem I’m having is that on my dataset the viewer shows only the split and not the subset:
but on the HF dataset, the viewer does show all the subsets:
What is going on? Can someone please enlighten me? Is it because I’m uploading parquet files and the automated parquet-converter tries to change the data?
Thanks!
---
**Author:**  [@John6666](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FJohn6666)%5C
**Post date:** [September 24, 2025, 12:26pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F2 "2025-09-24T12:26:31Z")
Oh. Seems working now ([maybe by your own commit](https://huggingface.co/datasets/iguanodon-ai/kubhist2/commit/eb524ac2df76995dcdedf8d4ba4c7ff780da3685)).
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**Author:**  [@drvenabili](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fdrvenabili)%5C
**Post date:** [September 24, 2025, 12:28pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F3 "2025-09-24T12:28:37Z")
Hi! Thanks but I don’t see it changed – the viewer only shows one split (train), and not the subsets (1640, 1650, 1660, etc.). Can you please provide a screenshot of why you see?
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**Author:**  [@John6666](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FJohn6666)%5C
**Post date:** [September 24, 2025, 12:31pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F4 "2025-09-24T12:31:13Z")
> the viewer only shows one split (train), and not the subsets (1640, 1650, 1660, etc.)
sure…
---
**Author:**  [@drvenabili](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fdrvenabili)%5C
**Post date:** [September 24, 2025, 12:32pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F5 "2025-09-24T12:32:55Z")
Thanks. Unfortunately that’s the issue I don´t understand. I have the same exact config as [HuggingFaceFW/finepdfs · Datasets at Hugging Face](https://huggingface.co/datasets/HuggingFaceFW/finepdfs) (in the README.md) and yet the result is different from them.
---
**Author:**  [@John6666](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FJohn6666)%5C
**Post date:** [September 24, 2025, 12:34pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F6 "2025-09-24T12:34:25Z")
How about this…?
* * *
Why it still shows one subset: your README YAML is using `metadata: dataset_info:` rather than the viewer’s `configs:` schema. The Hub viewer reads `configs:` for subsets. Your README currently lists decades under `metadata → dataset_info`, plus an `all` config marked `default: true`. That does not populate the viewer’s subset dropdown. ([Hugging Face](https://huggingface.co/datasets/iguanodon-ai/kubhist2/blob/main/README.md "README.md · iguanodon-ai/kubhist2 at main"))
Fix precisely:
1. Put a YAML front-matter block at the very top of `README.md` using `configs:`.
2. Keep your `all` entry if you want it as default, but list every decade under `configs:` too.
3. Remove the `metadata:` wrapper. Optional: keep separate `dataset_info:` if you want, but it does not drive the viewer.
Minimal example to paste at the very top of `README.md`:
```yaml
---
configs:
- config_name: "1640"
data_files:
- split: train
path: data/1640/train/*.parquet
- config_name: "1650"
data_files:
- split: train
path: data/1650/train/*.parquet
# …repeat for all decades…
- config_name: "all"
default: true
data_files:
- split: train
path: data/all/train/*.parquet
---
```
Reference syntax and behavior are defined in the Hub docs: use `configs:` with `data_files` for manual subsets; this is distinct from the metadata block. ([Hugging Face](https://huggingface.co/docs/hub/en/datasets-data-files-configuration "Data files Configuration"))
If you commit that change to `main`, the viewer should show a “Subset” dropdown with all decades.
---
**Author:**  [@drvenabili](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fdrvenabili)%5C
**Post date:** [September 24, 2025, 12:38pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdataset-viewer-not-showing-subsets%2F168631%2F7 "2025-09-24T12:38:51Z")
That did it! Thank you very much John!
Looks like I failed to edit the heading with migrating from the older dataset\_info to the newer configs, my bad.