Update README.md

README.md

@@ -58,4 +58,20 @@ Simply download the dataset as you would with any other Hugging Face dataset:
 from datasets import load_dataset
 
 dataset = load_dataset("tommasobonomo/ITAGutenberg")
-```
+```
+
+## 📊 Data Schema
+The dataset is organized with the following schema:
+
+* **`gutenberg_id`** *(str)* — Project Gutenberg key identifying the book.
+* **`title`** *(str)* — Title of the book.
+* **`text`** *(str)* — Full text of the book from Project Gutenberg.
+* **`tokenized_length`** *(int)* — Length in tokens of the book. Computed through the `cl100k_base` encoding from [`openai/tiktoken`](https://github.com/openai/tiktoken).
+* **`metadata`** *(dict)* — Additional contextual information about the book, including:
+
+  * **`authors`** *(list[str])* — Name of the book’s author(s).
+  * **`bookshelves`** *(list[str])* — Name of bookshelves that include this book, as per Project Gutenberg.
+  * **`encoding`** *(str)* — Name of the encoding of the original book source.
+  * **`languages`** *(list[str])* — Languages that appear in a specific book.
+  * **`summaries`** *(list[str])* — Summaries collected from Project Gutenberg for a specific book.
+  * **`url`** *(str)* — URL from which the text of the book was downloaded.