Add 'dc:', use 'rdfs:' instead of 'rdfs-schema:'.

README.md

@@ -127,12 +127,13 @@ These are:
     <tr><th>acl</th><td>http://www.w3.org/ns/auth/acl#</td></tr>
     <tr><th>dbpedia</th><td>http://dbpedia.org/property/</td></tr>
     <tr><th>dbpedia-owl</th><td>http://dbpedia.org/ontology/</td></tr>
+    <tr><th>dc</th><td>http://purl.org/dc/elements/1.1/</td></tr>
     <tr><th>dcterms</th><td>http://purl.org/dc/terms/</td></tr>
     <tr><th>dctype</th><td>http://purl.org/dc/dcmitype/</td></tr>
     <tr><th>foaf</th><td>http://xmlns.com/foaf/0.1/</td></tr>
     <tr><th>geo</th><td>http://www.w3.org/2003/01/geo/wgs84_pos#</td></tr>
     <tr><th>rdf</th><td>http://www.w3.org/1999/02/22-rdf-syntax-ns#</td></tr>
-    <tr><th>rdf-schema</th><td>http://www.w3.org/2000/01/rdf-schema#</td></tr>
+    <tr><th>rdfs</th><td>http://www.w3.org/2000/01/rdf-schema#</td></tr>
     <tr><th>schema</th><td>http://schema.org/</td></tr>
     <tr><th>vcard</th><td>http://www.w3.org/2006/vcard/ns#</td></tr>
     <tr><th>vocab</th><td>http://rdf.data-vocabulary.org/#</td></tr>

include/zotonic_rdf.hrl

@@ -9,6 +9,7 @@
 -define(NS_ACL, <<"http://www.w3.org/ns/auth/acl#">>).
 -define(NS_SCHEMA_ORG, <<"http://schema.org/">>).
 -define(NS_FOAF, <<"http://xmlns.com/foaf/0.1/">>).
+-define(NS_DC, <<"http://purl.org/dc/elements/1.1/">>).
 -define(NS_DCTERMS, <<"http://purl.org/dc/terms/">>).
 -define(NS_DCTYPE, <<"http://purl.org/dc/dcmitype/">>).
 -define(NS_DBPEDIA_OWL, <<"http://dbpedia.org/ontology/">>).

src/zotonic_rdf.erl

@@ -97,9 +97,10 @@ compact(Doc, Namespaces) ->
 namespaces() ->
     #{
         <<"rdf">> => ?NS_RDF,
-        <<"rdf-schema">> => ?NS_RDF_SCHEMA,
+        <<"rdfs">> => ?NS_RDF_SCHEMA,
         <<"foaf">> => ?NS_FOAF,
         <<"geo">> => ?NS_GEO,
+        <<"dc">> => ?NS_DC,
         <<"dcterms">> => ?NS_DCTERMS,
         <<"dctype">> => ?NS_DCTYPE,
         <<"vcard">> => ?NS_VCARD,