The easiest way that I could see were is adding a new table with your attributes. Inside this table you should have a column where you link the attribute to a tag by ID. You have to create an OpenAccess model
and then filter the data
that your public control will show. You can use WCF filtering
that OA supports.
When you use this way there could be a problem if someone deletes an item through the API or Sitefinity's UI which will result in an error at your end, because the tag ID would not be found in the taxon table.
All the best,
the Telerik team
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