chunk-doc-corpus.md

Chunking Document Corpus

You can chunk your document corpus into smaller chunks by following these steps. This is useful in building an index over a large corpus of long documents for RAG, or if you want to make sure that the document length is not too long for the model.

Given a Document Corpus JSONL file with the following format and contents field containing the "{title}\n{text}" format:

{ "id": 0, "contents": "..." }
{ "id": 1, "contents": "..." }
{ "id": 2, "contents": "..." }
...

You can run the following command:

cd scripts
python chunk_doc_corpus.py --input_path input.jsonl \
                          --output_path output.jsonl \
                          --chunk_by sentence \
                          --chunk_size 512

You will get a JSONL file with the following format:

{ "id": 0, "doc_id": 0, "title": ..., "contents": ... }
{ "id": 1, "doc_id": 0, "title": ..., "contents": ... }
{ "id": 2, "doc_id": 0, "title": ..., "contents": ... }
...

NOTE: That doc_id will be the same as the original document id, and contents will be the chunked document content in the new JSONL output.

Parameters

• input_path: Path to the input JSONL file.
• output_path: Path to the output JSONL file.
• chunk_by: Chunking method to use. Can be token, word, sentence, or recursive.
• chunk_size: Size of chunks.
• tokenizer_name_or_path: Name or path of the tokenizer that used for chunking.