Also of interest, an article from the research project on which Ultorg is based: Expressive Query Construction through Direct Manipulation of Nested Relational

Also of interest, an article from the research project on which Ultorg is based: Expressive Query Construction through Direct Manipulation of Nested Relational Results http://people.csail.mit.edu/ebakke/research/sieuferd_sigmod2016.pdf http://people.csail.mit.edu/ebakke/research/sieuferd_sigmod2... (PDF)