About: http://webisa.webdatacommons.org/6932424

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As far as I can see it, the main advantage of expression templates is, just as you say, that C++ templates are a language on their own, allowing a library author to do all kinds of optimizations and complex decisions at compile time.
http://www.w3.org/ns/prov#wasQuotedFrom	digitalmars.com