Why This Project

• Problem: Initial analysis suggeset that there is a helpful additional explanatory note in NACE v2.1 for classifying a case not available in ISIC rev5. No official correspondence exists between the latest ISIC v5 and NACE v2.1, yet analysis need cross-system comparability.
• Approach: Use LLM-assisted semantic mapping, then validate against master code lists to ensure 4-digit coverage and consistency.
• Outcome: A mapping in JSON and Excel with confidence and match-type metadata.

Data Inputs

• ISIC master: ISIC rev5 excel from UNStats
• NACE master: NACE v2.1 excel from EU ShowVoc

Example Output

original output is located /raw-output, while the combined and validation in /processed-output

...
{
  "isic_codes": ["0111"],
  "nace_codes": ["01.11"],
  "confidence": "High",
  "match_type": "one-to-one"
}
{
  "isic_codes": ["0141"],
  "nace_codes": ["01.41", "01.42"],
  "confidence": "High",
  "match_type": "one-to-many"
}
...

Some Findings