Add some important ontologies

Adds  vann: bookmark: skos: and sparql:

Author: jeff-zucker

index.js

@@ -56,7 +56,11 @@ const aliases = {
   vcard: 'http://www.w3.org/2006/vcard/ns#',
   wf: 'http://www.w3.org/2005/01/wf/flow#',
   xsd: 'http://www.w3.org/2001/XMLSchema#',
-  cco: 'http://www.ontologyrepository.com/CommonCoreOntologies/'
+  cco: 'http://www.ontologyrepository.com/CommonCoreOntologies/',
+  skos: 'http://www.w3.org/2004/02/skos/core#',
+  bookmark: 'http://www.w3.org/2002/01/bookmark#',
+  sparql: 'http://ontologi.es/sparql',
+  vann: 'http://purl.org/vocab/vann/'
 }
 
 /**