| --- |
| dataset_info: |
| - config_name: go-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 87536 |
| - config_name: go-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1532319 |
| - config_name: java-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 80906 |
| - config_name: java-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1456651 |
| - config_name: javascript-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 79484 |
| - config_name: javascript-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1298745 |
| - config_name: php-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 74945 |
| - config_name: php-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1311302 |
| - config_name: python-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 96670 |
| - config_name: python-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1779891 |
| - config_name: ruby-v1-hard-negatives-100k |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| - name: negs |
| list: string |
| splits: |
| - name: train |
| num_examples: 67937 |
| - config_name: ruby-v1-pair-2M |
| features: |
| - name: query |
| dtype: string |
| - name: pos |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 1145414 |
| configs: |
| - config_name: go-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: go-v1-hard-negatives-100k/train-* |
| - config_name: go-v1-pair-2M |
| data_files: |
| - split: train |
| path: go-v1-pair-2M/train-* |
| - config_name: java-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: java-v1-hard-negatives-100k/train-* |
| - config_name: java-v1-pair-2M |
| data_files: |
| - split: train |
| path: java-v1-pair-2M/train-* |
| - config_name: javascript-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: javascript-v1-hard-negatives-100k/train-* |
| - config_name: javascript-v1-pair-2M |
| data_files: |
| - split: train |
| path: javascript-v1-pair-2M/train-* |
| - config_name: php-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: php-v1-hard-negatives-100k/train-* |
| - config_name: php-v1-pair-2M |
| data_files: |
| - split: train |
| path: php-v1-pair-2M/train-* |
| - config_name: python-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: python-v1-hard-negatives-100k/train-* |
| - config_name: python-v1-pair-2M |
| data_files: |
| - split: train |
| path: python-v1-pair-2M/train-* |
| - config_name: ruby-v1-hard-negatives-100k |
| data_files: |
| - split: train |
| path: ruby-v1-hard-negatives-100k/train-* |
| - config_name: ruby-v1-pair-2M |
| data_files: |
| - split: train |
| path: ruby-v1-pair-2M/train-* |
| license: apache-2.0 |
| --- |
| # cornstack-samples |
|
|
| 🚧 This dataset is under active development and may change. |
|
|
| Filtered CoRNStack sample subsets for code retrieval training. |
|
|
| Source dataset and paper: |
| - CoRNStack collection: https://huggingface.co/collections/nomic-ai/cornstack |
| - CoRNStack paper: https://huggingface.co/papers/2412.01007 |
|
|
| Note: the original CoRNStack collection is a much larger dataset family for code search training. |
| If you need large-scale data (not samples), please refer to the original CoRNStack collection above. |
|
|
| ## What This Release Contains |
|
|
| This release keeps the original subset layout (6 languages x pair + hard-negatives) and applies deterministic rule-based filtering. |
|
|
| In this revision, query-level deduplication and positive-document (`pos`) deduplication are applied per subset. |
| For both rules, if duplicates exist, only the first row is kept. |
|
|
| ## Config Layout And Schema |
|
|
| Each language is published as two configs with split `train`: |
| - `{lang}-v1-pair-2M` |
| - `{lang}-v1-hard-negatives-100k` |
|
|
| Schema: |
| - Pair configs: `query`, `pos` |
| - Hard-negative configs: `query`, `pos`, `negs` (list[string]) |
|
|
| ## Subsets And Row Counts (After Filter + Query Dedup + Pos Dedup) |
|
|
| Note: subset names keep the original `2M` / `100k` naming convention for compatibility, but |
| actual row counts vary by language and can be substantially lower after quality filtering and |
| deduplication. |
|
|
| | Subset (config name) | split | num_examples | |
| | --- | --- | ---: | |
| | `go-v1-pair-2M` | `train` | 1,532,319 | |
| | `go-v1-hard-negatives-100k` | `train` | 87,536 | |
| | `java-v1-pair-2M` | `train` | 1,456,651 | |
| | `java-v1-hard-negatives-100k` | `train` | 80,906 | |
| | `javascript-v1-pair-2M` | `train` | 1,298,745 | |
| | `javascript-v1-hard-negatives-100k` | `train` | 79,484 | |
| | `php-v1-pair-2M` | `train` | 1,311,302 | |
| | `php-v1-hard-negatives-100k` | `train` | 74,945 | |
| | `python-v1-pair-2M` | `train` | 1,779,891 | |
| | `python-v1-hard-negatives-100k` | `train` | 96,670 | |
| | `ruby-v1-pair-2M` | `train` | 1,145,414 | |
| | `ruby-v1-hard-negatives-100k` | `train` | 67,937 | |
| |
| Total rows: |
| - Pair: 8,524,322 |
| - Hard-negatives: 487,478 |
| - Overall: 9,011,800 |
| |
| ## Dedup Impact (Pos Dedup Stage) |
| |
| The table below shows the `pos`-dedup impact on top of the previous filtered + query-deduped data. |
| |
| | Subset | before | after | removed | removed_ratio | |
| | --- | ---: | ---: | ---: | ---: | |
| | `go-v1-pair-2M` | 1,541,111 | 1,532,319 | 8,792 | 0.57% | |
| | `go-v1-hard-negatives-100k` | 87,647 | 87,536 | 111 | 0.13% | |
| | `java-v1-pair-2M` | 1,491,655 | 1,456,651 | 35,004 | 2.35% | |
| | `java-v1-hard-negatives-100k` | 81,657 | 80,906 | 751 | 0.92% | |
| | `javascript-v1-pair-2M` | 1,310,965 | 1,298,745 | 12,220 | 0.93% | |
| | `javascript-v1-hard-negatives-100k` | 79,684 | 79,484 | 200 | 0.25% | |
| | `php-v1-pair-2M` | 1,343,442 | 1,311,302 | 32,140 | 2.39% | |
| | `php-v1-hard-negatives-100k` | 75,632 | 74,945 | 687 | 0.91% | |
| | `python-v1-pair-2M` | 1,807,480 | 1,779,891 | 27,589 | 1.53% | |
| | `python-v1-hard-negatives-100k` | 97,147 | 96,670 | 477 | 0.49% | |
| | `ruby-v1-pair-2M` | 1,175,219 | 1,145,414 | 29,805 | 2.54% | |
| | `ruby-v1-hard-negatives-100k` | 68,382 | 67,937 | 445 | 0.65% | |
|
|
| Stage totals: |
| - Pair removed by pos dedup: 145,550 (1.68%) |
| - Hard-negatives removed by pos dedup: 2,671 (0.54%) |
| - Overall removed by pos dedup: 148,221 (1.62%) |
|
|
| ## Quick Usage |
|
|
| ```python |
| from datasets import load_dataset |
| |
| pair_ds = load_dataset("hotchpotch/cornstack-samples", "python-v1-pair-2M", split="train") |
| hard_ds = load_dataset("hotchpotch/cornstack-samples", "python-v1-hard-negatives-100k", split="train") |
| |
| print(pair_ds.column_names, len(pair_ds)) |
| print(hard_ds.column_names, len(hard_ds)) |
| ``` |
|
|
| ## License |
|
|
| This dataset follows CoRNStack and is released under **Apache-2.0**. |
|
|
| ## Citation And Attribution |
|
|
| If you use this dataset, please cite and attribute CoRNStack: |
| - Paper: https://huggingface.co/papers/2412.01007 |
| - Collection: https://huggingface.co/collections/nomic-ai/cornstack |
|
|
| ## Noise Filtering Algorithm (Rule-based) |
|
|
| The following deterministic rules are applied before publishing this release. |
|
|
| 1. Prefix-based noisy query removal |
| A row is dropped if `query` starts with any of the following prefixes: |
| - `TODO` |
| - `GET /` |
| - `POST /` |
| - `PUT /` |
| - `DELETE /` |
| - `Display a listing of the resource.` |
| - `Store a newly created resource in storage.` |
| - `Show the form for editing the specified resource.` |
| - `Update the specified resource in storage.` |
| - `Show the form for creating a new resource.` |
| - `Remove the specified resource from storage.` |
| - `Display the specified resource.` |
| - `Transform the resource into an array.` |
| - `Autogenerated method stub` |
| - `Auto generated` |
| - `this down() migration is autogenerated` |
| - `this up() migration is autogenerated` |
| - `"/ renamed from:"` |
| - `"/ access modifiers changed from:"` |
|
|
| 2. Minimum positive-document length |
| A row is dropped if the positive side text is shorter than 30 characters. |
| - Pair configs: `pos` length >= 30 required |
| - Hard-negative configs: `pos` length >= 30 required |
|
|
| 3. Hard-negative size constraint |
| For hard-negative configs in this release, each row keeps exactly seven negatives after normalization (`len(negs) = 7`, equivalent to `min_negs = 7`). |
|
|
| 4. Query-level deduplication |
| Within each subset split, rows are grouped by exact `query` string. |
| - Keep the first occurrence |
| - Drop all later duplicates |
|
|
| 5. Positive-document (`pos`) deduplication |
| Within each subset split, rows are grouped by exact `pos` string. |
| - Keep the first occurrence |
| - Drop all later duplicates |
|
|
| This filtering is purely rule-based (no model scoring), targeting high-noise templates and low-information positives while preserving broad retrieval coverage. |
|
|
