[Steven Clarke] I’ve been running another usability study on an API that makes heavy use of attributes and have made similar observations to a previous study. This time we’ve been looking at the Indigo APIs. Indigo makes heavy use of attributes throughout. For example, attributes are used to identify an interface as representing a service contract or a method inside that interface as a service operation.

I actually had the pleasure of sitting in with Steven on 2 of the usability sessions for Indigo this week (I was actually the team member he mentions in the post). I’ve been pretty interested to see how users grok the attribute model we’ve been working with, and it looks like there’s going to be lots of feedback from the study.