keyword indexes and tag clouds

[tomkralidis]

Using svn trunk, when I invoke GN homepage, and click "Advanced Search", a keywords text input is presented with an clickable icon which, which clicked, shows popular keywords with number of like records.

When looking through the underlying DB model (I'm using !MySQL), I can't seem to find where this keyword index is stored. Is it stored on disk instead? Where?

Having said this, I think this index lends very well to the concept of tag clouds [1]. One can envision tag clouds as being presented on the search page to allow users to click quickly to popular records, etc.

One can also envision the keyword index being available for tag-cloud generators as an APML document [2].

I think it would be worthwhile to add functionality to output APML documents as a portal service, i.e.:

http://host/geonetwork/srv/en/portal.apml?maxrecs=10

..where maxrecs would limit the results. A server-side configuration value can be set which is overridden by a URL param passed (if the URL param passed < server-side value).

[1] ​http://en.wikipedia.org/wiki/Tag_cloud

[2] ​http://en.wikipedia.org/wiki/APML

[ticheler]

Feature for new version

[heikki]

The ​http://trac.osgeo.org/geonetwork/wiki/proposals/WidgetsBasedGui proposal, which will be available in release 2.8 as a "experimental" GUI, contains a tag cloud -- although it uses words from the textual elements of metadata, not keywords.