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*** NOTE: THIS IS A SPECIAL ONE/NORTHWEST BRANCH OF TAG CLOUD'S TRUNK SPECIFICALLY FOR WTA.*** Description TagCloud is a proof-of-concept product to add a "tag cloud":http://en.wikipedia.org/wiki/Tag_cloud made with the keywords of all the items in a Plone site. This product is currently being used on the "breaking news site":http://www.jornada.unam.mx/ultimas of the mexican diary "La Jornada":http://www.jornada.unam.mx/. TagCloud is part of "Julius":http://julius.jornada.com.mx/, a project to create a system for Newspaper Workflow Automation based on the requirements of La Jornada and on the "IPTC News Architecture":http://www.iptc.org/. Installation This product was tested on Plone 2.5.2. Place TagCloud in the Products directory of your Zope instance and restart the server. (Linux users should fix permissions of files and folders first.) Go to the 'Site Setup' page in the Plone interface and click on the 'Add/Remove Products' link. Choose TagCloud (check its checkbox) and click the 'Install' button. You may have to empty your browser cache to see the effects of the product installation/uninstallation. Uninstall -- This can be done from the same management screen. How does it works TagCloud searchs for all different keywords on 'friendly types' and then creates a cloud based on the number of times every single keyword is found. To define 'friendly types' go to the 'Site Setup' page in the Plone interface and click on the 'Search Settings' link; all types used on searches will also be used to build the cloud. The algorithm to scale the tags and some ideas were taken from Anders Pearson's "scaling tag clouds":http://thraxil.com/users/anders/posts/2005/12/13/scaling-tag-clouds/ blog post. Please note that search engine spiders may stress your site if you have a bunch of tags, so it's a good idea to add the following lines to your robots.txt file: User-Agent: * Disallow: /search # don't do searches To-do list Create a configlet to define TTL of the cache and allow to purge it. Limit the items that build the cloud in two different ways: * on a given date like 'today' (currently all items are used) * to a list of review states (currently only 'published' items are used) Written by Héctor Velarde <hvelarde@jornada.com.mx>
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