I hope equal weight is given to both the Visual Editor and the Wiki Markup one. I also hope that the interface form is similar in behavior and style to the current forms (i.e., RefToolbar's Cite forms) -- as it would be a shame to reinvent the wheel, and would encourage onboarding of the interface if it looked like something editors have seen.

While I have an ongoing obsession with citations and machine-readable pipe-heavy templates like the Infobox, I would suspect that Wikipedia editors are very amenable to and recognize the importance of citations and supporting references for data on Wikipedia. That could and ideally should translate to similar approaches on Wikidata. So when I put a birth date on a biographical entry on Wikipedia, I need to provide a supporting citation. The same should be true for Wikidata. Unless I am missing something here.

So although the scale might be overwhelming, I would like to see every element on Wikidata supported by a citation. 

Very exciting work. Any ideas on the timeframe for potential implementation, Lydia?

Best,

- Erika