  This guide is for everyone who seeks advice for creating stable, secure, and
persistent Uniform Resource Identifiers (URIs) in order to publish their data
in accordance to the FAIR principles. The use case does not matter. It could
range from publishing the results of a small research project to a large
knowledge graph at a big corporation. The FAIR principles apply equally and
this is why it is important to put extra thought into the URI selection
process. The title aims to extend the tradition of "Cool URIs don't change" and
"Cool URIs for the Semantic Web". Much has changed since the publication of
these works and we would like to revisit some of the principles. Many still
hold today, some had to be reworked, and we could also identify new ones
