Text Chunking

We recommend some implementations of commonly used text chunking approaches.

Text Chunking is more a micro optimization, compared to the Flow Design.

It’s recommended to start with the Naive Chunking and optimize later.

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Example Python Code Samples

1. Naive (Fixed-Size) Chunking

Splits text by a fixed number of words, ignoring sentence or semantic boundaries.

def fixed_size_chunk(text, chunk_size=100):
    chunks = []
    for i in range(0, len(text), chunk_size):
        chunks.append(text[i : i + chunk_size])
    return chunks

However, sentences are often cut awkwardly, losing coherence.

2. Sentence-Based Chunking

import nltk

def sentence_based_chunk(text, max_sentences=2):
    sentences = nltk.sent_tokenize(text)
    chunks = []
    for i in range(0, len(sentences), max_sentences):
        chunks.append(" ".join(sentences[i : i + max_sentences]))
    return chunks

However, might not handle very long sentences or paragraphs well.

3. Other Chunking

• Paragraph-Based: Split text by paragraphs (e.g., newlines). Large paragraphs can create big chunks.
• Semantic: Use embeddings or topic modeling to chunk by semantic boundaries.
• Agentic: Use an LLM to decide chunk boundaries based on context or meaning.