Content management systems
Thomson Reuter provides OpenCalais as a Web service to index texts (http://www.opencalais.com) into several categories. And there exist a module for Drupal integrating the OpenCalais functionality into Drupal Websites (https://www.drupal.org/project/opencalais). If this module is enabled we have possibility to set certain characteristics in /admin/config/content/opencalais.
First we have to register at Thomson Reuter to get an access key that has to inserted in the settings dialog.
Then we can goto certain content nodes to decide whether they shall be analyzed by the indexing service. Different categories can be used. Social tags seems to be the most promising category. I have enabled the service for challenges and solutions.
Taggings:
Mapping taxonomy terms from Drupal 5 to Drupal 7
In Drupal 7 tagging terms are stored as fields of the entity. In previous Drupal versions tags are assigned to nodes stored in a table taxonomy_index(nid, tid, created). In D7 we have some table as for example field_data_field_taggings were each term refrerence is stored as a row. If more then one term is assigned to a content node (e.g. in the answers module), the value in the column delta incremented to have a unique key. To generate this table we need an sql statement that increments this delta if more than one term exist for the node.
