Update README.md

README.md

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----
-license: odbl
----
+---
+license: odbl
+task_categories:
+- text-classification
+- sentence-similarity
+language:
+- en
+tags:
+- code
+pretty_name: code-vs-text
+size_categories:
+- 10K<n<100K
+---
+
+
+This dataset was created for SemEval-2026 Task 13, which focuses on distinguishing machine-generated code from human-written code across multiple programming languages and domains.
+
+While the original SemEval task operates at the code snippet level, this dataset provides line-level annotations that enable finer-grained analysis of how code-like and text-like content is distributed within mixed inputs. The dataset is intended to support research in machine-generated code detection, robust preprocessing, and stylometric analysis, particularly in settings where natural language and programming code naturally coexist.
+
+Each row corresponds to a single line, extracted from real-world sources such as Stack Overflow posts and Twitch chat messages.
+
+## **Task Definition**
+
+**Binary line-level classification:**
+
+* **label = 0** — natural language text
+* **label = 1** — programming code
+
+The task is intentionally defined at the **line granularity**, rather than document or block level, to support applications such as preprocessing pipelines, mixed-content filtering, and robustness evaluation.
+
+---
+
+## **Dataset Structure**
+
+The dataset consists of **three columns**:
+
+| Column   | Description                                                                          |
+| -------- | ------------------------------------------------------------------------------------ |
+| `line`   | Raw line content (text or code). Punctuation, symbols, and formatting are preserved. |
+| `label`  | Binary label (0 = text, 1 = code).                                                   |
+| `source` | Data origin: `stackoverflow_2019`, `stackoverflow_2020`, or `twitch`.                |
+
+No aggressive normalization has been applied; punctuation, symbols, and formatting are preserved.
+
+---
+
+## **Data Collection and Processing**
+
+### **Stack Overflow Data**
+
+The Stack Overflow portion of the dataset was created by parsing **HTML post bodies** and explicitly separating structural elements:
+
+* Code lines are extracted from `&lt;code&gt;` tags
+* Text lines are extracted from `&lt;p&gt;` (paragraph) tags
+
+To ensure that extracted code corresponds to **actual programming content**, code blocks are filtered by post tags, retaining only posts associated with the following technologies:
+
+* `&lt;c++&gt;`, `&lt;java&gt;`, `&lt;python&gt;`, `&lt;php&gt;`, `&lt;c#&gt;`, `&lt;javascript&gt;`, `&lt;c&gt;`, `&lt;go&gt;`
+* `&lt;react-native&gt;`, `&lt;laravel&gt;`, `&lt;django&gt;`, `&lt;typescript&gt;`, `&lt;node.js&gt;`, `&lt;.net-core&gt;`
+
+**Additional filtering steps:**
+
+* Lines containing package installation commands (e.g. `pip`) are excluded
+* Lines dominated by error messages or stack traces are ignored
+* Duplicate lines are removed after normalization
+
+This filtering aims to retain **clean, representative programming code** while avoiding noisy or auxiliary content.
+
+---
+
+### **Twitch Data**
+
+The Twitch portion consists exclusively of **natural language text** and is included to introduce **informal, unstructured, and ambiguous language** that is difficult to distinguish from code using surface-level heuristics.
+
+**Key properties:**
+
+* No code labels are present in this subset
+* Duplicate lines are removed
+* Language is short, conversational, and noisy
+
+The purpose of this source is to **increase dataset difficulty** and improve **robustness to domain shift**.
+
+---
+
+## **Dataset Statistics**
+
+### **Overall Size**
+
+* **Total lines:** 52,270
+* **Text (label 0):** 27,330
+* **Code (label 1):** 24,940
+
+The dataset is approximately balanced, enabling standard classification benchmarks without mandatory resampling.
+
+---
+
+### **Label Distribution by Source**
+
+| Source             | Text (0) | Code (1) |
+| ------------------ | -------: | -------: |
+| stackoverflow_2019 |   14,698 |        0 |
+| stackoverflow_2020 |    7,948 |   24,940 |
+| twitch             |    4,684 |        0 |
+
+---
+
+### **Source Distribution**
+
+* **Stack Overflow 2020:** 32,888 lines (62.9%)
+* **Stack Overflow 2019:** 14,698 lines (28.1%)
+* **Twitch:** 4,684 lines (9.0%)
+
+---
+
+### **Line Length Statistics (Characters)**
+
+**Overall:**
+
+* **Mean:** 59.53
+* **Median:** 34
+* **Minimum:** 1
+* **Maximum:** 9,082
+* **Standard deviation:** 85.95
+
+**By source:**
+
+* **Stack Overflow 2019:** mean 88.71, median 58
+* **Stack Overflow 2020:** mean 51.60, median 33
+* **Twitch:** mean 23.62, median 17
+
+---
+
+## **Intended Use Cases**
+
+* Line-level code vs text classification
+* Mixed-content preprocessing and filtering
+* Robustness evaluation across domains
+* Stylometry and authorship analysis
+* Code-aware language modeling pipelines
+
+---
+
+## **Limitations**
+
+* Labels are **structural**, not semantic
+* Code-like text outside `&lt;code&gt;` tags is labeled as text
+* Logs or pseudo-code inside code blocks are labeled as code
+* Line-level context across adjacent lines is not preserved
+
+Users should account for these properties when designing downstream tasks.
+
+---
+
+## **Data Sources and Licensing**
+
+This dataset is derived from **publicly available sources**.
+Please refer to the following datasets for original data and licensing information:
+
+* **Stack Overflow dataset:** *(link to be added)*
+* **Twitch dataset:** *(link to be added)*
+
+Users are responsible for complying with the original licenses when redistributing or building upon this dataset.