--- a/paq/prov-aq.html	Thu Feb 07 13:44:50 2013 +0000
+++ b/paq/prov-aq.html	Thu Feb 07 14:50:18 2013 +0000
@@ -751,7 +751,7 @@
           If the provenance described by the request does not exist in the server, a <code>404 Not Found</code> response code SHOULD be returned.
         </p>
         <p>
-          The format of the returned provenance description is not defined here, but may be established through content type negotiation using <code>Accept:</code> header fields in the HTTP request.  A provenance query service SHOULD be capable of returning RDF using the vocabulary defined by [[PROV-O]], in any standard RDF serialization (e.g. RDF/XML), or any other standard serialization of the Provenance Model specification [[PROV-DM]].  Services MUST identify the <code>Content-Type</code> of the information returned.
+          The format of the returned provenance description is not defined here, but may be established through content type negotiation using <code>Accept:</code> header fields in the HTTP request.  A provenance query service SHOULD be capable of returning RDF using the vocabulary defined by [[PROV-O]], in at least one of the standard RDF serializations (e.g. RDF/XML), or any other standard serialization of the Provenance Model specification [[PROV-DM]].  Services MUST identify the <code>Content-Type</code> of the information returned.
         </p>
         <p>
           Additional URI query parameters may be used as indicated by the service description in <a href="#provenance-query-service-description" class="sectionRef"></a>.