Use Case 1: Discover and plot data from common sensor types automatically
  -> e.g., via SOS Services

1.	Portal presents a category "CTD" for a user to get data from a CTD sensor
2.	Users goes to a portal and searches data from CTD sensors
3.	Portal asks a registry for Sensor Observation Services which have as a method a CTD sensor 
    [ need a URI to categorize this type ]
4.	Registry looks for services whose method is a CTD sensor 
    [URI of CTD ]
5.	Registry returns services that uses a CTD sensor 
    [ that matches the URI of the CTD ]
6.	Portal uses the service information retrieve from the registry to get the data.
7.	Portal knows how to plot CTD data and presents a preview to the user

The term 'CTD' could be replaced by vertical profiler or any other type of sensor.