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You notice that after splitting documents using Langchain, the resulting chunks have no metadata. What is the most probable cause?

medium📝 Debug Q7 of 15
LangChain - Text Splitting
You notice that after splitting documents using Langchain, the resulting chunks have no metadata. What is the most probable cause?
AThe original documents did not contain any metadata
BThe chunk size was set too large
CThe splitter automatically removes metadata by default
DThe documents were not converted to strings before splitting
Step-by-Step Solution
Solution:

  1. Step 1: Verify original metadata

    If the original Document objects lack metadata, chunks will also have empty metadata.

  2. Step 2: Understand splitter behavior

    Langchain splitters preserve metadata if present; they do not remove it by default.

  3. Final Answer:

    The original documents did not contain any metadata -> Option A

  4. Quick Check:

    Check original metadata presence [OK]
Quick Trick: Chunks inherit metadata only if original docs have it [OK]
Common Mistakes:
  • Assuming splitter deletes metadata
  • Blaming chunk size for missing metadata
  • Forgetting to add metadata to original documents

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