21. Put in other words, links specify the relationship of the data with other data items . 22. Files have " extent data items " to track the extents which hold their contents. 23. Space redundancy provides additional components, functions, or data items that are unnecessary for fault-free operation. 24. In addition, each data item is fully traceable and explicitly referenced to the original source. 25. For each class interval, the amount of data items falling in this interval is counted. 26. In addition, nearly every data item is fully traceable and explicitly referenced to the original source. 27. Some data items are not numbers but what Ascher and Ascher call " number labels ". 28. The data items can be simple numbers, or the result of calculations based on template parameters. 29. The amount of data items stored in memory? 30. Data items are versioned, which maximizes data integrity.
