techno.md

@@ -39,6 +39,7 @@
 
 See also:
  * *[What are the pros and cons of RDB2RDF tools?]* on Stack Overflow
+ * *[RDF and SQL]* on Wikipedia
  * *[converter2rdf]* on the W3C wiki
  * *[Graph DataBase]* on Wikipedia
 
@@ -101,6 +102,7 @@ See also:
 [allegrograph]:http://franz.com/agraph/allegrograph/
 [marklogic]:http://www.marklogic.com/
 [What are the pros and cons of RDB2RDF tools?]:https://stackoverflow.com/questions/45476632/what-are-the-pros-and-cons-of-rdb2rdf-tools
+[RDF and SQL]:https://www.w3.org/wiki/RdfAndSql
 [converter2rdf]:https://www.w3.org/wiki/ConverterToRdf#SQL
 [graph database]:https://en.wikipedia.org/wiki/Graph_database
 [nodejs]:https://nodejs.org/en/