In the current version of HydroDesktop, it is still Keyword.
I think the decision depends upon how the search works.
If it only looks in a limited finite list, "Keyword" or "Search Term" should not be used, but a specific word like parameter which represents what is this list of finite terms.
How do these words match to the actual VariableName in the controlled vocabulary/ontology?
Is someone behind the green curtain creating synonyms? How are they going to keep up with all synonyms and avoid confusing the user who might worry that if they don’t pick all forms of nitrate listed, e.g., they will miss getting some data? (That is
what I would do!)
The keyword searching tool deserves some discussion very soon.