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=====Contents=====

  * [[https://www.linuxfoundation.org/#Its_own_tagging_engine_for_everybody|1 Its own tagging engine for everybody]]
    * [[https://www.linuxfoundation.org/#Pro:|1.1 Pro:]]
    * [[https://www.linuxfoundation.org/#Contra:|1.2 Contra:]]
  * [[https://www.linuxfoundation.org/#Central_Tagging_Server|2 Central Tagging Server]]
    * [[https://www.linuxfoundation.org/#Pro:_2|2.1 Pro:]]
    * [[https://www.linuxfoundation.org/#Contra:_2|2.2 Contra:]]
    * [[https://www.linuxfoundation.org/#Possible_cooperation_architecture|2.3 Possible cooperation architecture]]

======  Its own tagging engine for everybody ======

The following figure illustrates that everybody has it's own tagging engine.

{{https://wiki.linuxfoundation.org/images/7/79/Tag-engine-dist1.2.png?nolink|}}

Each server has it's own tags for it's projects.
=====  Pro: =====

  *  I (the repository hoster) control everything myself
=====  Contra: =====

  *  e.g. freshmeat lists lots of projects that are hosted somewhere else, so do they allow to tag those? -> Projects may contain different sets of tags, depending on which site you look for tags
======  Central Tagging Server ======

This figure illustrates how one single tagging server could work and be connected to others.

{{https://wiki.linuxfoundation.org/images/9/9f/Tag-engine-dist2.1.png?nolink|}}

All tags are stored on one single server (well, physically this can also be a distributed system, but at some level this should be transparent)
=====  Pro: =====

  *  tags added on e.g. sourceforge could be seen immediately on freshmeat too :)
  *  consistent tags for each project, no matter on which site you look at it
  *  even very small projects that don't use one of the participating software repositories might join the central server and thus could be tagged and found by searches
=====  Contra: =====

  *  dependence on s.b. else .. it should be well chosen **who** is responsible for the central tagging server (best would be some alliance between major repo-sites)
  *  requires unique id's for each project that participates. (could be the url like sourceforge.net/projects/osstag)
  *  might slow down repository-sites, as each page-view on one of those could require a connection to the server (maybe read-only replication could help here a lot)
  *  some repo sites might fear that this server could take away traffic from themself (could be corrected if the central-server does not offer searching via some html-interface at all, but only via participating repo-sites)
=====  Possible cooperation architecture =====

{{https://wiki.linuxfoundation.org/images/0/00/Tag-engine-dist3.png?nolink|}}

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