The D3 system achieves a high level of performance by using storage space efficiently. Data is economically stored using only the necessary data and delimiter characters to separate fields and records.
An item (record) in D3 is made up an item-ID and zero or more attributes (fields), which make up the data stored for this item. Each atomic piece of data or value is separated by a delimiter to separate it from other values. The entire item also has a special delimiter to separate it from other items.
The full structure of an item as it is stored within the D3 system contains the following:
Item-ID (terminated by one or two attribute marks, whichever is needed for the item body to begin on an even byte address)
Item Body (which can contain any number of attributes)
Item (terminated by one or two segment marks as necessary for it to end on an odd byte address)
These topics are presented:
See Also