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To free the collection of relations from undesirable insertion, update and deletion dependencies. To reduce the need for restructuring the collection of relations, as new types of data are introduced, and thus increase the life span of application programs. To make the relational model more informative to users.
The most common free software license, the GNU General Public License (GPL), is a form of copyleft and is used for the Linux kernel and many of the components from the GNU Project. [ 109 ] Linux-based distributions are intended by developers for interoperability with other operating systems and established computing standards.