Link to SEP area

README.md

@@ -4,4 +4,8 @@ Welcome to the [SPARQL-dev Community Group](https://www.w3.org/community/sparql-
 
 [Mailing list archive](https://lists.w3.org/Archives/Public/public-sparql-dev/).
 
-There are a lot of [issues](https://github.com/w3c/sparql-dev/issues) being worked on and also have a look at the [wiki](https://github.com/w3c/sparql-dev/wiki)
+There are a lot of [issues](https://github.com/w3c/sparql-dev/issues) being
+worked on and also have a look at the
+[wiki](https://github.com/w3c/sparql-dev/wiki).
+
+Some issues have been written up as [SPARQL Enhancement Proposals (SEP)](./SEP).