z kontekstu: dane mają byc aktualizowane i odnawiane

por. Wikipedia:
Data maintenance is the adding, deleting, changing and updating of binary and high-level files, and the real world data associated with those files. Data can be maintained manually and/or through an automated program, but at origination and translation/delivery point must be translated into a binary representation for storage. Data is usually edited at a slightly higher level in a format relevant to the content of the data (such as text, images, or scientific or financial information). It is also the backing up, storage and general up keep of this all this data in the long term.