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OPAL is a Drupal plugin that analyses comments posted by users and detects whether they are positive, negative or neutral. In addition, it calculates the joint polarity of all comments attached to a content type and deliveries an overall rank for the post.
The goal of the application is to show how opinion mining can aid in assessment of content such as ideas in Idea Management Systems.
By default OPAL will add snippets to all content types and comments.
For content types it will display:
An image that visualises balance between emotions expressed in all comments
Overall polarity score together with percentage of positive/negative/neutral posts
Amount of positive, negative and neutral posts
For each comment:
An image that visualises the sentiments in the comment (positive, negative or neutral)
Enabling access control for specific fields on nodes based on user location. Administrators create settings for each profile containing a list of countries and which fields are under control.