implemented in TaggingApi, PimContentTraining

= Prerequisite =
A thing in the pimo is trained to some words. The project "branchoffice" is trained to the documents "businessplan" and "paul's address" and "Description of office building".
The paul:!ProductEncyclopedia is trained to some garbage website.

Paul browses to a useful website "office supplies" related to branchoffice.

= Result = 
website "office supplies" is tagged (occurrence-link) to thing "branchoffice".

= Trigger =
Paul clicks "tag this website" in Firefox.

= Procedure =
 * Paul browses to website "office supplies"
 * Paul clicks "tag this"
 * Website is transfered to TaggingApi, taggingapi checks fulltext using PimContentTraining
 * TaggingApi suggests "surely be branchoffice, may be ProducktEncyclopedia"
 * Paul clicks on "branchoffice"
 * tagging happens in TaggingApi

= Alternatives =
 * No thing found during search, the most (or the 5 most?) used tags should be displayed an highlighted (So that Paul can start typing and the tag gets deleted automatically); Paul chooses to use this one or just enters the tag by himself, see use case: UseCaseTagging