Report 2: Defining Data Validation

• Basic data validation is required whenever data cannot be trusted.
• For a data record with distinct fields, ascertain that
  • individual fields have an admissible value,
  • there are no contradicting field values within a record,
  • there are no contradictions between different records.
• There is no limit for the complexity of data correctness rules.
• Concentrate on the elementary checks of simple field values: numeric, string, or enumeration.
• Implementation in a manageable way, potentially accessible to the user of an application.