| Keyword | Definition |
|---|---|
| Length check | a type of validation that checks if the expected amount of data is provided |
| Lookup check | a type of validation that checks if data matches a list of acceptable values |
| Presence check | a type of validation that checks if any data has been provided at all |
| Type check | a type of validation that checks if data is the expected data type |
| Validation | checking data to make sure that it is suitable to be processed or outputted |
