Sharealike: Difference between revisions

    From Consumerium development wiki R&D Wiki
    (making clear that "viral license" = "share-alike" = defining attribute of open content and free documentation)
    (#REDIRECT share-alike as Wikipedia does)
     
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    '''Share-alike''' is a required reintegration clause of several [[parametric license]]s in [[Creative Commons]] and some monolithic ones like [[GFDL]].  It simply means that anyone improving a work must share the improved work with others who wish to use or improve it. 
    #REDIRECT [[share-alike]]
     
    It is a key feature of the [[GPL]] too which applies this principle to [[source code]].  It is sometimes called the '''viral license''' feature - the fact that accepting the license breeds more acceptance of the license.  This is considered very desirable by some and very undesirable by others (who started the [[open source]] movement to oppose the '''share-alike''' requirement.  ''See also [[problems with free software and open source models]].''
     
    The most common '''share-alike''' licenses used are in '''open content''' and in '''free documentation''' efforts, which require such licenses by definition:
     
    *the [[GFDL]], strictly share-alike, no license but the GFDL can apply to any improvements, and there are strict rules about what can go in [[Secondary Section]]s and [[Invariant Section]]s to which asymmetric rules might apply - this license is used at [[Wikipedia]]
     
    *the [[CC-by-sa]] license, quite close to the [[GFDL]] but is incompatible with it.  ''Things licensed under the CC regime are not part of the [[GFDL Corpus]].''  This license is used at [[Wikitravel]]
     
    Most efforts use share alike licenses for both code and content, e.g. the '''CC-nc-sa''' license - the closest approximation yet to a [[Green Documentation License]] - is used for [[GetWiki]] code.
     
    ''See [[w:Share_Alike]] for a more general introduction linked to other legal topics.''
     
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    [[faction]]al comment:
     
    [[Reds]] prefer [[Free Software]] apparently because everything "has to be free".
     
    [[Golds]] prefer [[Open Source]] apparently so they can exploit the commons without obligation to give back.
     
    [[Trolls]] like sharing, but bite you on the leg if you try to tell them they have to share with you, even if you are doing harm to them.

    Latest revision as of 16:39, 6 September 2004

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