“Web-based System Supporting Remixing and Collaboration on Media”

• Homepage: http://wiki.creativecommons.org/CcHost
• License: GPL
• Example: http://ccmixter.org/
• Language: PHP

• source: http://svn.sourceforge.net/viewcvs.cgi/cctools/cchost/trunk/cclib/cc-tags.php?view=markup&rev=3294

• uses tag-min-length and tag-max-length constants
• supports AdminTags
• maps tag-urls via separate url-mapper, includes permissions (admin_only or dont_care_logged_in)
• all tags are converted to lower-case
• compares new tags to already existing ones if not inserted by admin
• all tags are treated equally (no levels or tagging-classes)
• deletion of tags allowed
• has pretty complex database-layer which creates sql-statements based on changes in php-objects. (this part might be useful, at least it could be valuable as 'code-snippet')

• not primarily tagging-engine, but web-based infrastructure to support collaboration, sharing, and storage of multi-media
• optimized for Audio files (e.g. extracts MP3 ID-Tags from mp3-files)

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