If you are using the same text preprocessing pipeline for the LLM Embedding model and BoW/TFIDF, you're doing it wrong
𝗖𝗼𝗺𝗺𝗼𝗻 𝗺𝗶𝘀𝘁𝗮𝗸𝗲𝘀:
1/ 𝗢𝘃𝗲𝗿-𝗽𝗿𝗲𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 𝗳𝗼𝗿 𝗟𝗟𝗠 𝗘𝗺𝗯𝗲𝗱𝗱𝗶𝗻𝗴 𝗠𝗼𝗱𝗲𝗹𝘀
𝗧𝗵𝗲 𝗽𝗿𝗼𝗯𝗹𝗲𝗺: Extensive preprocessing removes important context and nuances
𝗤𝘂𝗶𝗰𝗸 𝗳𝗶𝘅: Keep preprocessing minimal to preserve original text structure and meaning
2/ 𝗨𝗻𝗱𝗲𝗿-𝗽𝗿𝗲𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 𝗳𝗼𝗿 𝗧𝗿𝗮𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗠𝗲𝘁𝗵𝗼𝗱𝘀 (𝗲.𝗴., 𝗕𝗮𝗴 𝗼𝗳 𝗪𝗼𝗿𝗱𝘀, 𝗧𝗙-𝗜𝗗𝗙)
𝗧𝗵𝗲 𝗽𝗿𝗼𝗯𝗹𝗲𝗺: Inadequate preprocessing leads to high dimensionality and noise
𝗤𝘂𝗶𝗰𝗸 𝗳𝗶𝘅: Use more extensive preprocessing to standardize text and reduce dimensionality
3/ 𝗨𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗦𝗮𝗺𝗲 𝗣𝗶𝗽𝗲𝗹𝗶𝗻𝗲 𝗳𝗼𝗿 𝗕𝗼𝘁𝗵
𝗧𝗵𝗲 𝗽𝗿𝗼𝗯𝗹𝗲𝗺: LLM Embedding Models and Traditional Methods have different requirements
𝗤𝘂𝗶𝗰𝗸 𝗳𝗶𝘅: Tailor your preprocessing approach to the specific model
The key difference is that LLM embedding models are designed to understand context, semantics, and nuances in language, so they benefit from receiving text that's as close to its original form as possible.
𝗧𝗿𝘆 𝘁𝗵𝗶𝘀 𝗶𝗻𝘀𝘁𝗲𝗮𝗱
𝗙𝗼𝗿 𝗟𝗟𝗠 𝗘𝗺𝗯𝗲𝗱𝗱𝗶𝗻𝗴 𝗠𝗼𝗱𝗲𝗹𝘀 (𝗲.𝗴., 𝗲5_𝗹𝗮𝗿𝗴𝗲_𝘃2):
- Removing excessive whitespace
- Handling line breaks and formatting issues
- Removing or replacing special characters
- Stripping HTML tags if present
- Unicode normalization
- Optionally handling URLs and email addresses
𝗙𝗼𝗿 𝗧𝗿𝗮𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗠𝗲𝘁𝗵𝗼𝗱𝘀 (𝗕𝗮𝗴 𝗼𝗳 𝗪𝗼𝗿𝗱𝘀, 𝗧𝗙-𝗜𝗗𝗙):
- Tokenization
- Lowercasing
- Stop word removal
- Stemming or lemmatization
- Removing punctuation and numbers
- Handling of n-grams
𝗥𝗲𝗺𝗲𝗺𝗯𝗲𝗿:
The right preprocessing can make all the difference.
𝗬𝗼𝘂𝗿 𝘁𝘂𝗿𝗻:
✍️ What's your top tip for effective text preprocessing?
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