Update dataset card and referenced assets

README.md

@@ -1,3 +1,102 @@
-# This is a placeholder README.md
+---
+license: other
+task_categories:
+- text-generation
+tags:
+- k2-horizon
+- training-data
+- parquet
+- web
+- question-answering
+configs:
+- config_name: web-high-augmented
+  data_files:
+  - split: train
+    path: "web-high-augmented/*.parquet"
+- config_name: web-high-medium
+  data_files:
+  - split: train
+    path: "web-high-medium/*.parquet"
+- config_name: txt360-qa
+  data_files:
+  - split: train
+    path: "txt360-qa/*.parquet"
+---
 
-Private staging repo.
+# TxT360-v2
+
+## Dataset Description
+
+Web and question-answering text selected for the K2 Horizon training-data release. This repository is part of the [K2 Horizon collection](https://huggingface.co/collections/IFM/k2-horizon).
+
+The release is organized as one Hugging Face configuration per subset. Every configuration has a `train` split backed by Parquet shards, which supports Dataset Viewer inspection and streaming access.
+
+## K2 Horizon Dataset Series
+
+| Dataset repository | Focus | Configurations |
+| --- | --- | ---: |
+| [IFM/TxT360-v2](https://huggingface.co/datasets/IFM/TxT360-v2) | Web and question-answering text | 3 |
+| [IFM/Code-Reasoning](https://huggingface.co/datasets/IFM/Code-Reasoning) | Code reasoning and task synthesis | 7 |
+| [IFM/Math-Reasoning](https://huggingface.co/datasets/IFM/Math-Reasoning) | Mathematical reasoning and dialogue | 5 |
+| [IFM/SFT-Reasoning](https://huggingface.co/datasets/IFM/SFT-Reasoning) | Instruction following and supervised fine-tuning | 2 |
+| [IFM/Pretrain-Behaviors](https://huggingface.co/datasets/IFM/Pretrain-Behaviors) | Behavior-focused continued-pretraining data | 7 |
+
+## Dataset Configurations
+
+| Configuration | Catalog source | Data files |
+| --- | --- | --- |
+| `web-high-augmented` | `nltk-web-high-randomized` | `web-high-augmented/*.parquet` |
+| `web-high-medium` | `web-high-medium` | `web-high-medium/*.parquet` |
+| `txt360-qa` | `txt360-qa` | `txt360-qa/*.parquet` |
+
+## Repository Structure
+
+```text
+README.md
+web-high-augmented/
+  <source-file>-<stable-id>-00000.parquet
+  <source-file>-<stable-id>-00001.parquet
+web-high-medium/
+  <source-file>-<stable-id>-00000.parquet
+  <source-file>-<stable-id>-00001.parquet
+txt360-qa/
+  <source-file>-<stable-id>-00000.parquet
+  <source-file>-<stable-id>-00001.parquet
+```
+
+The shard prefix is derived from the source JSONL filename and a stable identifier. Updating one source JSONL file replaces only that file's Parquet shards.
+
+## Data Fields
+
+Records originate as JSON objects and are converted to Parquet for release. Field names and nested structures can differ by configuration. Inspect `features` before building a processing pipeline:
+
+```python
+from datasets import load_dataset
+
+dataset = load_dataset(
+    "IFM/TxT360-v2",
+    "web-high-augmented",
+    split="train",
+    streaming=True,
+)
+print(dataset.features)
+print(next(iter(dataset)))
+```
+
+## Data Provenance and Processing
+
+The configurations in this repository are selected from the data inventory used to prepare the K2 Horizon training mixture. Only release-approved configurations are included. JSONL records are converted to Parquet without intentionally renaming application-level fields.
+
+Individual configurations may have undergone source-specific filtering, cleaning, deduplication, quality scoring, or synthetic-data generation. Users should evaluate each configuration for their target use case and inspect the available provenance metadata.
+
+## Intended Use
+
+This dataset is intended for language-model training and research. The configurations can be streamed independently, combined with user-defined sampling weights, or inspected through the Hugging Face Dataset Viewer.
+
+## Limitations and Responsible Use
+
+Large-scale training data can contain factual errors, duplicated material, sensitive topics, stereotypes, unsafe content, and other artifacts. Dataset users are responsible for performing evaluations, risk assessment, and filtering appropriate to their application.
+
+## License and Terms of Use
+
+This repository contains multiple configurations that may have different source terms. Users are responsible for reviewing the applicable provenance and license information for the configurations they use and for determining suitability for their intended purpose.