As a result, equipment or products, including embedded control logic, may fail completely, malfunction or cause data to be corrupted. To avoid such problems, organizations must check, and modify if necessary, internally produced equipment and products and similarly check externally supplied equipment and products with their suppliers. The purpose of this document is to allow such checks to be made on a basis of common understanding. Where checks are made with external suppliers, care should be taken to distinguish between claims of conformity and the ability to demonstrate conformity. This rule is sometimes known as general integrity .
Current date means today's date as known to the equipment or product.
This rule is sometimes known as date integrity . This rule means that all equipment and products must calculate, manipulate and represent dates correctly for the purposes for which they were intended. The meaning of functionality includes both processes and the results of those processes. Rules for century inferencing as a whole must apply to all contexts in which the date is used, although different inferencing rules may apply to different date sets. General Notes For Rules 1 and 2 in particular, organisations may wish to specify allowable ranges for values of current date and dates to be manipulated.