LicensingModels < Training2

%SECTION0{name=LicensingModels}% Licensing Models
  
   * GPL and LGPL
      * __GPL__ guarantees the following freedoms (as in _free speech_, not _free beer_)
         1 You can _run_ the program as you wish for any purpose
         1 You can _study_ the source code and _change_ it to do what you want
         1 You can _make copies_ and distribute them
         1 You can _distribute_ modified versions
      * _Derivative work inherits_ license (mistermed _virus nature of GPL_)
      * _Linking_ is considered derivative work in *GPL* but not in _Lesser GNU Public License_ (*LGPL*)%BR%
        -> *GNU libc* is most prominent LGPLd program
        <p></p>

   * BSD style licences:
      * __MIT:__ Copyright and permission notice must be included in all copies or substantial parts of the Software
      * __BSD:__ non attribution provision (contributers names may not be used to endorse or %BR%
                 promote products without permission), advertising clause (removed 1999)
      * __Apache Free License v2:__ strong branding, contributions become part of licensed work, license terminates if licensee initiates patent litigation
      * -> *BSD* style licenses have no such _derivative work_ clause and thus cannot prevent "misuse" of software (*OpenBSD*, *FreeBSD*, *NetBSD*)
      * -> commercial application is usually intended (BSD Unix, X Window System)

   * MPL (Mozilla Public License)
      * somewhere in between BSD and GPL
      * weak Copyleft: MPL source code modified stays MPL, but can be combined with any other code to form a proprietary program
      * NPL (Netscape Public License): variant that gives original developer the right to distribute %BR%
        modifications by other contributers under whatever terms it desires.

   * Open Source vs. Free Software

   * _Open source_ can be any license acknowledged by the *Open Source Initiative* (incl. all mentioned above)

   * Because of so many licenses all dubbed "open source", check which freedoms they _really_ entail
4.2. Background Information		1. Denx Training Topics		4.2.2. Standards and Portability in the Unix world
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