Suppose you were designing a database to store accidents, and you had the need to categorize them, are the categories below sufficient? By accident here I mean non-intentional occurrences which lead to undesirable consequences...

1. Vehicle
Accidents involving vehicles with at least 4 wheels

2. Cycles (is there a better name for this?)
Vehicles with three wheels and less

3. Buildings

4. Infrastructure, e.g. bridges collapsing etc

5. Marine
How do you differentiate someone drowning from a boat sinking?

6. Aircraft

7. Ordinance?
Old military appliances that tend to explode?

8. Domestic
Accidents which happen at home. But if a fire takes place at home, and a fire takes place at a factory, are these two different categories or should they be the same, or both?

9. Industrial





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