31. Currently the standard has catalogued the most important components and data items for metal cutting devices. 32. The first rule ensures that a data item is not read and written by two transactions concurrently. 33. Lucid is based on an algebra of histories, a history being an infinite sequence of data items . 34. They keep track of the location of data items in the stream in any way they want. 35. Considering data events as relevant data item state transitions allows defining complex event-reaction schemata for a database. 36. Each pointer is bound to a single dynamic data item , and can only be moved by assignment: 37. Each data item has a tag. 38. The names,, and are ambiguous by themselves, since more than one data item is defined with those names. 39. Any duplicated data items are discarded. 40. In complicated applications of statistics, there may be several ways in which the number of data items may grow.
