"Library" in new ASCAP registration

I'm working on some end of the year clerical tasks this week (ugh!), one of which is to register some of my old titles with ASCAP. They have a new online registration system. One of the things they ask (which is either new or I hadn't noticed before) is what the work is used for. is it for film/TV, multimedia, etc., or part of a "library?"

It got me to thinking: Pond5 is technically a library, but not necessarily in the traditional sense. I reached out to P5 support for their take and they're looking at it. Meanwhile, I thought I'd throw it out to the community to see if anybody else has dealt with this and how you handled it.

The more I think about it, my work could end up in any number of applications. Also, since most of my portfolio is non-exclusive I could have works in more than one "library" (and I often do). So, unless I hear a definitive answer to the contrary I'm leaning toward just punting and leaving that bit of the form blank (which is an option).

Since I started this, I thought I'd share the reply from support. They echoed the conclusion I had basically already reached (per previous post). Therefore, I'll move forward and leave that part of the registration form blank.

I’ve never filled out that portion of the form, and neither have any of the publishers who represent my work.