I agree, that was a great post on what it is & isn't
The catch is going to be the software developers & how much time & effort all the companies with their current systems are going to invest into this. The other catch from reviewing the schema (mind you I am not a programer) is the lack for multiple foundations, R Values, etc... which might need some further tweeking before everyone comes up with their own idea's (foundation_w foundationw foundation1 or a or _1 or _a)
Great feedback, Sean. I'm not a programmer either (very far from it!), so I found the article very helpful. I know BPI is working to make it an ANSI standard, so that might prompt the software developers, many of whom provided input into the HPXML's development.
I can't speak to the particulars of the schema, but I bet your point is the kind of feedback the team needs to make this really work well for contractors. If you feel so inclined, firstname.lastname@example.org is the email for submitting ideas and asking questions.