Key points are not available for this paper at this time.
This paper does not offer a survey of the semiring framework. Rather, it is intended to bring forward, with the benefit of 20/20 (well, at least 15/20) hindsight, a couple of insights that were not emphasized in the papers that constitute the core of the framework's development. These insights do not even pertain to all the technical aspects of the framework, leaving out, most notably, Datalog. We have also tried to collect a reasonably large set of relevant references. Most of all, we hope to make the reader intrigued enough to follow up with additional reading and perhaps examine further research questions.
Green et al. (Tue,) studied this question.