rights, and then this definition of ``modify'' is used to define ``modified

version of'' and ``work based on,'' as synonyms.

GPLv3 uses a common license drafting technique of building upon simpler

definitions to make complex ones.  The Program is a defined term found

of the wording in GPLv3 to be simpler and clearer than its GPLv2

counterparts.

The term ``propagate'' serves two purposes.  First, ``propagate'' provides a

simple and convenient means for distinguishing between the kinds of uses of a

internationalization, but also factually-based terminology aids in

developers' and users' understanding of GPL\@.

Further to this point, a subset of propagate --- ``convey'' --- is defined.

Conveying includes activities that constitute propagation of copies to

others.  As with the definition of propagate, GPLv3 thus addresses transfers

of copies of software in behavioral rather than statutory terms.  

GPLv2 used the term ``appropriate copyright notice and disclaimer of

warranty'' in two places, which is a rather bulk term.  Also, experience with

Appropriate Legal Notice definition consolidates the material that GPLv2

traditionally required preserved into one definition.

Note finally that not all defined terms in GPLv3 appear in GPLv3~\S0.

Specifically, those defined terms that are confined in use to a single