Simplify dataset paths and sources section

README.md

@@ -46,33 +46,19 @@ print(len(db))
 db.close()
 ```
 
-## Available Dataset Paths
+## Dataset Paths and Sources
 
-The main public dataset paths currently exposed in this repository include:
+The main public dataset paths currently exposed in this repository are:
 
-- `lematbulk/pbe`
-- `matpes/pbe`
-- `matpes/r2scan`
-- `mp_aloe`
-- `mptrj`
-- `omat/train`
-- `omat/val`
+- `lematbulk/pbe`, from [LeMat-Bulk](https://huggingface.co/datasets/LeMaterial/LeMat-Bulk). If you use this path, cite LeMat-Bulk.
+- `matpes/pbe` and `matpes/r2scan`, from [MatPES](https://docs.materialsproject.org/collaborations/matpes). If you use these paths, cite MatPES.
+- `mp_aloe`, from [MP-ALOE](https://www.nature.com/articles/s41524-025-01834-9). If you use this path, cite MP-ALOE.
+- `mptrj`, from [MPtrj](https://docs.materialsproject.org/services/ml-and-ai-applications/mptrj). If you use this path, cite MPtrj.
+- `omat/train` and `omat/val`, from [OMAT24](https://huggingface.co/datasets/facebook/OMAT24). If you use these paths, cite OMAT24.
 
 These paths may be stored as one `.atp` file or as a shard directory.
 `atompack.hub.open(...)` handles both through the same read-only API.
 
-## Upstream Dataset Sources
-
-The packaged datasets in this repository come from the following upstream sources:
-
-- `lematbulk/pbe`: [LeMat-Bulk](https://huggingface.co/datasets/LeMaterial/LeMat-Bulk). If you use this path, cite LeMat-Bulk.
-- `matpes/pbe`, `matpes/r2scan`: [MatPES](https://docs.materialsproject.org/collaborations/matpes). If you use these paths, cite MatPES.
-- `mp_aloe`: [MP-ALOE](https://www.nature.com/articles/s41524-025-01834-9). If you use this path, cite MP-ALOE.
-- `mptrj`: [MPtrj](https://docs.materialsproject.org/services/ml-and-ai-applications/mptrj). If you use this path, cite MPtrj.
-- `omat/train`, `omat/val`: [OMAT24](https://huggingface.co/datasets/facebook/OMAT24). If you use these paths, cite OMAT24.
-
-If you use one of these dataset paths, please cite the corresponding upstream dataset.
-
 ## Why Atompack
 
 Atompack is designed for the point where atomistic datasets stop behaving like small scientific