I agree with this. It is common to hear "Partial SPARQL 1.1 support"... or "Partial OWL compatibility" or "A variant of SKOS is supported". While it is true th

I agree with this. It is common to hear "Partial SPARQL 1.1 support"... or "Partial OWL compatibility" or "A variant of SKOS is supported". While it is true that full ECMA6/HTTP2/IPv6/SQL is also rarely provided by implementations, this doesn't hinder their use in productive environments. I think it is rare to reach the parts of ECMAscript that aren't implemented, or the corners of SQL that Postgres/MariaDB don't support. In many of the "Semantic Web Stack", however, one quickly reaches a "not implemented" portion of the 500 page owl standard.