In order to appreciate how quickly things are evolving in this research area, one should make a comparison between Huggett &amp; Wüthrich (2013a) and Meschini et al. (2005), also meant to be a survey paper. Interestingly enough, Huggett and Wüthrich describe their survey as complementary to the other one. In the latter paper the work of Manfred Requardt is briefly presented and this will serve as a prototypical example because it does not introduce the physical side of things right from the start. To have a taste of more sophisticated approaches that do involve physics right from the start, see Smolin (2018), where also quantum loop gravity, mentioned directly above, is discussed. Although such approaches, both the basic and the sophisticated cases, are not mentioned in the literature on spatial logics, nevertheless the connections between the two are very deep and close and definitely need to be explored further.