| ## Data Card — IEEE-CIS Fraud Detection |
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| ### Source |
| - Kaggle competition dataset: “IEEE-CIS Fraud Detection” |
| - Files used: `train_transaction.csv` (+ optional `train_identity.csv`) |
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| ### Target |
| - `isFraud` (1 = fraud) |
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| ### Preprocessing |
| - Selected compact feature subset for portability |
| - Frequency encoding for selected categorical fields |
| - Median imputation for numeric missing values |
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| ### License / access |
| - You must accept the Kaggle competition rules to download the data. |
| - This repository does **not** redistribute the dataset. |
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