Turtle
en.wikipedia.org/wiki/Turtle_(syntax)
Article
Turtle (syntax)
Format for expressing data in the RDF data model
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Turtle (Terse RDF Triple Language) is a serialisation format for RDF (Resource Description Framework) graphs.