In this question the OP is looking for designs for school construction.
Does that fall in the scope of the site?
If it does, it seems people can ask for any digitally stored (not copyrighted) material - that is open and data after all. Even information on paper (i.e. a reference to a book) would be fine.
Quoting from the help center:
Open data, as defined by the Open Definition, is any kind of data that can be freely used, modified, and shared by anyone for any purpose.
Data requests ("Where can I find data about … ?") are usually welcome for any topic
Maybe data should be limited to more than one data point?