EDIT

The access points should be searchable also by the accesspoint title, For the BGBM Herbarium the webservice lists the following information:

 { 
   "datasets": [ 
     { 
       "title": "Herbarium Berolinense, Berlin (B)" 
     } 
   ], 
   "service_url": "http://ww3.bgbm.org/biocase/pywrapper.cgi?dsa=Herbar" 
}

If you are searching for the BGBM herbarium it is impossible to find the access point if you don't know the ulr already.

Suggestion:

• allow searching/filtering the ulrs by datasets.title AND service_url
• display the matching string (datasets.title OR service_url) together with the service_url. I have no idea how this can be done in swt. In html the label and value for a select option are different things (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/select)

I agree with the above. Maybe the title is enough. Users usually recognize a collection by its title not it's service. Only advanced users may know the service URL. Maybe a switch between showing title or URL could be implemented. Or we concatenate both (but this ends up in a very long label. Or we fill the combobox with both title and URLs but advanced users may wonder what is the difference.

Another issue: the list should also be available for the ABCD preferences (DBprefs and local). Also there we distinguish DNA provider and ordinary providers. Is it somehow possible to distinguish if a provider provides DNA data?