RDF data access | Resource Description Framework | SPARQL
Shape Expressions (ShEx) is a data modelling language for validating and describing a Resource Description Framework (RDF). It was proposed at the 2012 RDF Validation Workshop as a high-level, concise language for RDF validation. The shapes can be defined in a human-friendly compact syntax called ShExC or using any RDF serialization formats like JSON-LD or Turtle. ShEx expressions can be used both to describe RDF and to automatically check the conformance of RDF data. The syntax of ShEx is similar to Turtle and SPARQL while the semantics is inspired by regular expression languages like RelaxNG. (Wikipedia).
Markus Reineke - Cohomological Hall Algebras and Motivic Invariants for Quivers 1/4
We motivate, define and study Donaldson-Thomas invariants and Cohomological Hall algebras associated to quivers, relate them to the geometry of moduli spaces of quiver representations and (in special cases) to Gromov-Witten invariants, and discuss the algebraic structure of Cohomological H
From playlist 2021 IHES Summer School - Enumerative Geometry, Physics and Representation Theory