Update README.md

README.md

@@ -39,8 +39,9 @@ The dataset is provided in **Parquet format** and includes the following columns
 | Column Name        | Type             | Description                                                                 |
 |--------------------|------------------|-----------------------------------------------------------------------------|
 | `chunk_id`         | `str`            | Unique generated identifier for each text chunk.                            |
-| `cid`              | `str`            | Unique identifier of the decision (e.g., `CONSTEXT...`).                    |
-| `chunk_number`     | `int`            | Index of the chunk within the same decision.                                |
+| `doc_id`           | `str`            | Document identifier from the source site.                                   |
+| `chunk_index`      | `int`            | Index of the chunk within the same document.                                |
+| `chunk_xxh64`      | `str`            | XXH64 hash of the `chunk_text` value.                                       |
 | `nature`           | `str`            | Nature of the decision (e.g., Non lieu à statuer, Conformité, etc.).        |
 | `solution`         | `str`            | Legal outcome or conclusion of the decision.                                |
 | `title`            | `str`            | Title summarizing the subject matter of the decision.                       |
@@ -59,11 +60,12 @@ The dataset is provided in **Parquet format** and includes the following columns
 The following fields were extracted and/or transformed from the original source:
 
 - **Basic fields**:
-  - `cid`, `title`, `nature`, `solution`, `number`, and `decision_date` are extracted directly from the metadata of each decision record.
+  - `doc_id` (cid), `title`, `nature`, `solution`, `number`, and `decision_date` are extracted directly from the metadata of each decision record.
 
 - **Generated fields**:
   - `chunk_id`: a generated unique identifier combining the `cid` and `chunk_number`.
-  - `chunk_number`: index of the chunk from the original decision.
+  - `chunk_index`: is the index of the chunk of a same document. Each document has an unique `doc_id`.
+  - `chunk_xxh64`: is the xxh64 hash of the `chunk_text` value. It is useful to determine if the `chunk_text` value has changed from a version to another.
 
 - **Textual fields**:
   - `text`: chunk of the main text content.