Again, it depends. Outcomes are contingent upon what you're doing, as you may (1) not be able to get a license for use; (2) you may not need one; or (3) it may be so cost prohibitive as to not be worthwhile. IP question of law are heavily fact dependent. If you don't want to share your idea because you feel it's one of a kind, or something, I understand. However, that brings it into the realm of actual legal advice rather than the philosophical exercise on the topic. I'm not sure, however. how someone could answer you based on the information on here. Or maybe I just don't get it.
You should edit your question to be as precise as you feel comfortable being, with regard to what exactly you want to mine, collect, database, distribute, and how you intend to profit from the model. Without that....??
Sounds good. Focus on types of data, what the site will offer (will it be a searchable database, will folk review or critique stuff, or will you be making money specifically from the data you've mined. Good luck!
So, you would be sort of like a Kayak or another clearinghouse site, but more broad. So the only question that remains is who pays the mo et? The companies? Adsense or another advertising strategy for revenue that's similar? Or the actual users. That should be all for an analysis.
Just curious, how does that benefit the user who could just do a Google (or other) search for their target source. That it will be databased? So, if you are charging the user, the copyright/licensing question gets far less clear. There is a 4 prong test for fair use vs. infringement and with that, the most relied upon prong is without question whether someone is making a direct profit from copyrighted materials. I'm still a little unsure of the format or why this is different than any free search engine.
This is fine. I'd wager that this is not even fair use - which is a defense to a copyright claim that allows the use of copyrighted materials for the public good - because you are not "using" the copyrighted material at all. You are merely indexing what's in the public domain. I cannot see a problem with what you just described.
That being said, if you have clients that are paying you to build an app like this...I would just charge them (under research and development) for a quick, written opinion where an attorney would state in writing that what you are doing is not an infringement. It wouldn't cost much; it's pretty cut and dry if this is the extent of it, and then if there are other trade secret issues you don't want to disclose here that could impact the determination, you can disclose. If you get sued, their malpractice coverage would pick up the tab for your damages if opinion is wrong and you fully disclose.