diff --git a/src/Swish/RDF/RDFGraph.hs b/src/Swish/RDF/RDFGraph.hs
--- a/src/Swish/RDF/RDFGraph.hs
+++ b/src/Swish/RDF/RDFGraph.hs
@@ -998,7 +998,7 @@
 
 type RevNamespaceMap = LookupMap RevNamespace
 
--- | Create an emoty namespace map.
+-- | Create an empty namespace map.
 emptyNamespaceMap :: NamespaceMap
 emptyNamespaceMap = LookupMap []
 
diff --git a/src/Swish/RDF/Vocabulary/SIOC.hs b/src/Swish/RDF/Vocabulary/SIOC.hs
new file mode 100644
--- /dev/null
+++ b/src/Swish/RDF/Vocabulary/SIOC.hs
@@ -0,0 +1,469 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+--------------------------------------------------------------------------------
+--  See end of this file for licence information.
+--------------------------------------------------------------------------------
+-- |
+--  Module      :  Swish.RDF.Vocabulary.SIOC
+--  Copyright   :  (c) 2011 Douglas Burke
+--  License     :  GPL V2
+--
+--  Maintainer  :  Douglas Burke
+--  Stability   :  experimental
+--  Portability :  OverloadedStrings
+--
+--  This module defines some commonly used vocabulary terms from the SIOC
+--  project (<http://sioc-project.org/>).
+--
+--------------------------------------------------------------------------------
+
+module Swish.RDF.Vocabulary.SIOC
+    ( 
+      -- | The version used for this module is Revison 1.35 of the
+      -- \"SIOC Core Ontology Specification\", dated 25 March 2010,
+      -- <http://rdfs.org/sioc/spec/>.
+      namespaceSIOC
+      
+      -- * Classes
+      , siocCommunity
+      , siocContainer
+      , siocForum
+      , siocItem
+      , siocPost
+      , siocRole
+      , siocSite
+      , siocSpace
+      , siocThread
+      , siocUserAccount
+      , siocUsergroup
+        
+      -- * Properties
+      , siocabout
+      , siocaccount_of
+      , siocaddressed_to
+      , siocadministrator_of
+      , siocattachment
+      , siocavatar
+      , sioccontainer_of
+      , sioccontent
+      , sioccreator_of
+      , siocearlier_version
+      , siocemail
+      , siocemail_sha1
+      , siocembeds_knowledge
+      , siocfeed
+      , siocfollows
+      , siocfunction_of
+      , siochas_administrator
+      , siochas_container
+      , siochas_creator
+      , siochas_discussion
+      , siochas_function
+      , siochas_host
+      , siochas_member
+      , siochas_moderator
+      , siochas_modifier
+      , siochas_owner
+      , siochas_parent
+      , siochas_reply
+      , siochas_scope
+      , siochas_space
+      , siochas_subscriber
+      , siochas_usergroup
+      , siochost_of
+      , siocid
+      , siocip_address
+      , sioclast_activity_date
+      , sioclast_item_date
+      , sioclast_reply_date
+      , sioclater_version
+      , sioclatest_version
+      , sioclink
+      , sioclinks_to
+      , siocmember_of
+      , siocmoderator_of
+      , siocmodifier_of
+      , siocname
+      , siocnext_by_date
+      , siocnext_version
+      , siocnote
+      , siocnum_authors
+      , siocnum_items
+      , siocnum_replies
+      , siocnum_threads
+      , siocnum_views
+      , siocowner_of
+      , siocparent_of
+      , siocprevious_by_date
+      , siocprevious_version
+      , siocrelated_to
+      , siocreply_of
+      , siocscope_of
+      , siocsibling
+      , siocspace_of
+      , siocsubscriber_of
+      , sioctopic
+      , siocusergroup_of 
+    )
+where
+
+import Swish.Utils.Namespace (Namespace, makeNamespace, ScopedName, makeNSScopedName)
+
+import Data.Maybe (fromMaybe)
+import Network.URI (URI, parseURI)
+
+import qualified Data.Text as T
+
+------------------------------------------------------------
+--  Namespace
+------------------------------------------------------------
+
+siocURI :: URI
+siocURI = fromMaybe (error "Internal error processing SIOC URI") $ parseURI "http://rdfs.org/sioc/ns#"
+
+-- | Maps @sioc@ to <http://rdfs.org/sioc/ns#>.
+namespaceSIOC :: Namespace
+namespaceSIOC = makeNamespace (Just "sioc") siocURI
+
+------------------------------------------------------------
+--  Terms
+------------------------------------------------------------
+
+toS :: T.Text -> ScopedName
+toS  = makeNSScopedName namespaceSIOC
+
+-- Classes
+
+-- | @sioc:Community@ from <http://rdfs.org/sioc/spec/#term_Community>. 
+siocCommunity :: ScopedName
+siocCommunity = toS "Community"
+
+-- | @sioc:Container@ from <http://rdfs.org/sioc/spec/#term_Container>. 
+siocContainer :: ScopedName
+siocContainer = toS "Container"
+
+-- | @sioc:Forum@ from <http://rdfs.org/sioc/spec/#term_Forum>. 
+siocForum :: ScopedName
+siocForum = toS "Forum"
+
+-- | @sioc:Item@ from <http://rdfs.org/sioc/spec/#term_Item>. 
+siocItem :: ScopedName
+siocItem = toS "Item"
+
+-- | @sioc:Post@ from <http://rdfs.org/sioc/spec/#term_Post>. 
+siocPost :: ScopedName
+siocPost = toS "Post"
+
+-- | @sioc:Role@ from <http://rdfs.org/sioc/spec/#term_Role>. 
+siocRole :: ScopedName
+siocRole = toS "Role"
+
+-- | @sioc:Site@ from <http://rdfs.org/sioc/spec/#term_Site>. 
+siocSite :: ScopedName
+siocSite = toS "Site"
+
+-- | @sioc:Space@ from <http://rdfs.org/sioc/spec/#term_Space>. 
+siocSpace :: ScopedName
+siocSpace = toS "Space"
+
+-- | @sioc:Thread@ from <http://rdfs.org/sioc/spec/#term_Thread>. 
+siocThread :: ScopedName
+siocThread = toS "Thread"
+
+-- | @sioc:UserAccount@ from <http://rdfs.org/sioc/spec/#term_UserAccount>. 
+siocUserAccount :: ScopedName
+siocUserAccount = toS "UserAccount"
+
+-- | @sioc:Usergroup@ from <http://rdfs.org/sioc/spec/#term_Usergroup>. 
+siocUsergroup :: ScopedName
+siocUsergroup = toS "Usergroup"
+
+-- Properties
+
+-- | @sioc:about@ from <http://rdfs.org/sioc/spec/#term_about>. 
+siocabout :: ScopedName
+siocabout = toS "about"
+
+-- | @sioc:account_of@ from <http://rdfs.org/sioc/spec/#term_account_of>. 
+siocaccount_of :: ScopedName
+siocaccount_of = toS "account_of"
+
+-- | @sioc:addressed_to@ from <http://rdfs.org/sioc/spec/#term_addressed_to>. 
+siocaddressed_to :: ScopedName
+siocaddressed_to = toS "addressed_to"
+
+-- | @sioc:administrator_of@ from <http://rdfs.org/sioc/spec/#term_administrator_of>. 
+siocadministrator_of :: ScopedName
+siocadministrator_of = toS "administrator_of"
+
+-- | @sioc:attachment@ from <http://rdfs.org/sioc/spec/#term_attachment>. 
+siocattachment :: ScopedName
+siocattachment = toS "attachment"
+
+-- | @sioc:avatar@ from <http://rdfs.org/sioc/spec/#term_avatar>. 
+siocavatar :: ScopedName
+siocavatar = toS "avatar"
+
+-- | @sioc:container_of@ from <http://rdfs.org/sioc/spec/#term_container_of>. 
+sioccontainer_of :: ScopedName
+sioccontainer_of = toS "container_of"
+
+-- | @sioc:content@ from <http://rdfs.org/sioc/spec/#term_content>. 
+sioccontent :: ScopedName
+sioccontent = toS "content"
+
+-- | @sioc:creator_of@ from <http://rdfs.org/sioc/spec/#term_creator_of>. 
+sioccreator_of :: ScopedName
+sioccreator_of = toS "creator_of"
+
+-- | @sioc:earlier_version@ from <http://rdfs.org/sioc/spec/#term_earlier_version>. 
+siocearlier_version :: ScopedName
+siocearlier_version = toS "earlier_version"
+
+-- | @sioc:email@ from <http://rdfs.org/sioc/spec/#term_email>. 
+siocemail :: ScopedName
+siocemail = toS "email"
+
+-- | @sioc:email_sha1@ from <http://rdfs.org/sioc/spec/#term_email_sha1>. 
+siocemail_sha1 :: ScopedName
+siocemail_sha1 = toS "email_sha1"
+
+-- | @sioc:embeds_knowledge@ from <http://rdfs.org/sioc/spec/#term_embeds_knowledge>. 
+siocembeds_knowledge :: ScopedName
+siocembeds_knowledge = toS "embeds_knowledge"
+
+-- | @sioc:feed@ from <http://rdfs.org/sioc/spec/#term_feed>. 
+siocfeed :: ScopedName
+siocfeed = toS "feed"
+
+-- | @sioc:follows@ from <http://rdfs.org/sioc/spec/#term_follows>. 
+siocfollows :: ScopedName
+siocfollows = toS "follows"
+
+-- | @sioc:function_of@ from <http://rdfs.org/sioc/spec/#term_function_of>. 
+siocfunction_of :: ScopedName
+siocfunction_of = toS "function_of"
+
+-- | @sioc:has_administrator@ from <http://rdfs.org/sioc/spec/#term_has_administrator>. 
+siochas_administrator :: ScopedName
+siochas_administrator = toS "has_administrator"
+
+-- | @sioc:has_container@ from <http://rdfs.org/sioc/spec/#term_has_container>. 
+siochas_container :: ScopedName
+siochas_container = toS "has_container"
+
+-- | @sioc:has_creator@ from <http://rdfs.org/sioc/spec/#term_has_creator>. 
+siochas_creator :: ScopedName
+siochas_creator = toS "has_creator"
+
+-- | @sioc:has_discussion@ from <http://rdfs.org/sioc/spec/#term_has_discussion>. 
+siochas_discussion :: ScopedName
+siochas_discussion = toS "has_discussion"
+
+-- | @sioc:has_function@ from <http://rdfs.org/sioc/spec/#term_has_function>. 
+siochas_function :: ScopedName
+siochas_function = toS "has_function"
+
+-- | @sioc:has_host@ from <http://rdfs.org/sioc/spec/#term_has_host>. 
+siochas_host :: ScopedName
+siochas_host = toS "has_host"
+
+-- | @sioc:has_member@ from <http://rdfs.org/sioc/spec/#term_has_member>. 
+siochas_member :: ScopedName
+siochas_member = toS "has_member"
+
+-- | @sioc:has_moderator@ from <http://rdfs.org/sioc/spec/#term_has_moderator>. 
+siochas_moderator :: ScopedName
+siochas_moderator = toS "has_moderator"
+
+-- | @sioc:has_modifier@ from <http://rdfs.org/sioc/spec/#term_has_modifier>. 
+siochas_modifier :: ScopedName
+siochas_modifier = toS "has_modifier"
+
+-- | @sioc:has_owner@ from <http://rdfs.org/sioc/spec/#term_has_owner>. 
+siochas_owner :: ScopedName
+siochas_owner = toS "has_owner"
+
+-- | @sioc:has_parent@ from <http://rdfs.org/sioc/spec/#term_has_parent>. 
+siochas_parent :: ScopedName
+siochas_parent = toS "has_parent"
+
+-- | @sioc:has_reply@ from <http://rdfs.org/sioc/spec/#term_has_reply>. 
+siochas_reply :: ScopedName
+siochas_reply = toS "has_reply"
+
+-- | @sioc:has_scope@ from <http://rdfs.org/sioc/spec/#term_has_scope>. 
+siochas_scope :: ScopedName
+siochas_scope = toS "has_scope"
+
+-- | @sioc:has_space@ from <http://rdfs.org/sioc/spec/#term_has_space>. 
+siochas_space :: ScopedName
+siochas_space = toS "has_space"
+
+-- | @sioc:has_subscriber@ from <http://rdfs.org/sioc/spec/#term_has_subscriber>. 
+siochas_subscriber :: ScopedName
+siochas_subscriber = toS "has_subscriber"
+
+-- | @sioc:has_usergroup@ from <http://rdfs.org/sioc/spec/#term_has_usergroup>. 
+siochas_usergroup :: ScopedName
+siochas_usergroup = toS "has_usergroup"
+
+-- | @sioc:host_of@ from <http://rdfs.org/sioc/spec/#term_host_of>. 
+siochost_of :: ScopedName
+siochost_of = toS "host_of"
+
+-- | @sioc:id@ from <http://rdfs.org/sioc/spec/#term_id>. 
+siocid :: ScopedName
+siocid = toS "id"
+
+-- | @sioc:ip_address@ from <http://rdfs.org/sioc/spec/#term_ip_address>. 
+siocip_address :: ScopedName
+siocip_address = toS "ip_address"
+
+-- | @sioc:last_activity_date@ from <http://rdfs.org/sioc/spec/#term_last_activity_date>. 
+sioclast_activity_date :: ScopedName
+sioclast_activity_date = toS "last_activity_date"
+
+-- | @sioc:last_item_date@ from <http://rdfs.org/sioc/spec/#term_last_item_date>. 
+sioclast_item_date :: ScopedName
+sioclast_item_date = toS "last_item_date"
+
+-- | @sioc:last_reply_date@ from <http://rdfs.org/sioc/spec/#term_last_reply_date>. 
+sioclast_reply_date :: ScopedName
+sioclast_reply_date = toS "last_reply_date"
+
+-- | @sioc:later_version@ from <http://rdfs.org/sioc/spec/#term_later_version>. 
+sioclater_version :: ScopedName
+sioclater_version = toS "later_version"
+
+-- | @sioc:latest_version@ from <http://rdfs.org/sioc/spec/#term_latest_version>. 
+sioclatest_version :: ScopedName
+sioclatest_version = toS "latest_version"
+
+-- | @sioc:link@ from <http://rdfs.org/sioc/spec/#term_link>. 
+sioclink :: ScopedName
+sioclink = toS "link"
+
+-- | @sioc:links_to@ from <http://rdfs.org/sioc/spec/#term_links_to>. 
+sioclinks_to :: ScopedName
+sioclinks_to = toS "links_to"
+
+-- | @sioc:member_of@ from <http://rdfs.org/sioc/spec/#term_member_of>. 
+siocmember_of :: ScopedName
+siocmember_of = toS "member_of"
+
+-- | @sioc:moderator_of@ from <http://rdfs.org/sioc/spec/#term_moderator_of>. 
+siocmoderator_of :: ScopedName
+siocmoderator_of = toS "moderator_of"
+
+-- | @sioc:modifier_of@ from <http://rdfs.org/sioc/spec/#term_modifier_of>. 
+siocmodifier_of :: ScopedName
+siocmodifier_of = toS "modifier_of"
+
+-- | @sioc:name@ from <http://rdfs.org/sioc/spec/#term_name>. 
+siocname :: ScopedName
+siocname = toS "name"
+
+-- | @sioc:next_by_date@ from <http://rdfs.org/sioc/spec/#term_next_by_date>. 
+siocnext_by_date :: ScopedName
+siocnext_by_date = toS "next_by_date"
+
+-- | @sioc:next_version@ from <http://rdfs.org/sioc/spec/#term_next_version>. 
+siocnext_version :: ScopedName
+siocnext_version = toS "next_version"
+
+-- | @sioc:note@ from <http://rdfs.org/sioc/spec/#term_note>. 
+siocnote :: ScopedName
+siocnote = toS "note"
+
+-- | @sioc:num_authors@ from <http://rdfs.org/sioc/spec/#term_num_authors>. 
+siocnum_authors :: ScopedName
+siocnum_authors = toS "num_authors"
+
+-- | @sioc:num_items@ from <http://rdfs.org/sioc/spec/#term_num_items>. 
+siocnum_items :: ScopedName
+siocnum_items = toS "num_items"
+
+-- | @sioc:num_replies@ from <http://rdfs.org/sioc/spec/#term_num_replies>. 
+siocnum_replies :: ScopedName
+siocnum_replies = toS "num_replies"
+
+-- | @sioc:num_threads@ from <http://rdfs.org/sioc/spec/#term_num_threads>. 
+siocnum_threads :: ScopedName
+siocnum_threads = toS "num_threads"
+
+-- | @sioc:num_views@ from <http://rdfs.org/sioc/spec/#term_num_views>. 
+siocnum_views :: ScopedName
+siocnum_views = toS "num_views"
+
+-- | @sioc:owner_of@ from <http://rdfs.org/sioc/spec/#term_owner_of>. 
+siocowner_of :: ScopedName
+siocowner_of = toS "owner_of"
+
+-- | @sioc:parent_of@ from <http://rdfs.org/sioc/spec/#term_parent_of>. 
+siocparent_of :: ScopedName
+siocparent_of = toS "parent_of"
+
+-- | @sioc:previous_by_date@ from <http://rdfs.org/sioc/spec/#term_previous_by_date>. 
+siocprevious_by_date :: ScopedName
+siocprevious_by_date = toS "previous_by_date"
+
+-- | @sioc:previous_version@ from <http://rdfs.org/sioc/spec/#term_previous_version>. 
+siocprevious_version :: ScopedName
+siocprevious_version = toS "previous_version"
+
+-- | @sioc:related_to@ from <http://rdfs.org/sioc/spec/#term_related_to>. 
+siocrelated_to :: ScopedName
+siocrelated_to = toS "related_to"
+
+-- | @sioc:reply_of@ from <http://rdfs.org/sioc/spec/#term_reply_of>. 
+siocreply_of :: ScopedName
+siocreply_of = toS "reply_of"
+
+-- | @sioc:scope_of@ from <http://rdfs.org/sioc/spec/#term_scope_of>. 
+siocscope_of :: ScopedName
+siocscope_of = toS "scope_of"
+
+-- | @sioc:sibling@ from <http://rdfs.org/sioc/spec/#term_sibling>. 
+siocsibling :: ScopedName
+siocsibling = toS "sibling"
+
+-- | @sioc:space_of@ from <http://rdfs.org/sioc/spec/#term_space_of>. 
+siocspace_of :: ScopedName
+siocspace_of = toS "space_of"
+
+-- | @sioc:subscriber_of@ from <http://rdfs.org/sioc/spec/#term_subscriber_of>. 
+siocsubscriber_of :: ScopedName
+siocsubscriber_of = toS "subscriber_of"
+
+-- | @sioc:topic@ from <http://rdfs.org/sioc/spec/#term_topic>. 
+sioctopic :: ScopedName
+sioctopic = toS "topic"
+
+-- | @sioc:usergroup_of@ from <http://rdfs.org/sioc/spec/#term_usergroup_of>. 
+siocusergroup_of :: ScopedName
+siocusergroup_of = toS "usergroup_of"
+
+--------------------------------------------------------------------------------
+--
+--  Copyright (c) 2011 Douglas Burke
+--  All rights reserved.
+--
+--  This file is part of Swish.
+--
+--  Swish is free software; you can redistribute it and/or modify
+--  it under the terms of the GNU General Public License as published by
+--  the Free Software Foundation; either version 2 of the License, or
+--  (at your option) any later version.
+--
+--  Swish is distributed in the hope that it will be useful,
+--  but WITHOUT ANY WARRANTY; without even the implied warranty of
+--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--  GNU General Public License for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with Swish; if not, write to:
+--    The Free Software Foundation, Inc.,
+--    59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+--
+--------------------------------------------------------------------------------
diff --git a/swish.cabal b/swish.cabal
--- a/swish.cabal
+++ b/swish.cabal
@@ -1,5 +1,5 @@
 Name:               swish
-Version:            0.6.2.1
+Version:            0.6.3.0
 Stability:          experimental
 License:            LGPL
 License-file:       LICENSE 
@@ -46,6 +46,8 @@
   .
   Changes:
   .
+  [Version 0.6.3.0] Added "Swish.RDF.Vocabulary.SIOC".
+  .
   [Version 0.6.2.1] Hackage did not want to upload @0.6.2.0@, so re-try by 
   disabling the @hpc@ and @developer@ flags for the tests to 
   work around what appears to be <http://hackage.haskell.org/trac/hackage/ticket/811>.
@@ -252,6 +254,7 @@
       Swish.RDF.Vocabulary.Geo
       Swish.RDF.Vocabulary.OWL
       Swish.RDF.Vocabulary.RDF
+      Swish.RDF.Vocabulary.SIOC
       Swish.RDF.Vocabulary.XSD
       Swish.Utils.ListHelpers
       Swish.Utils.LookupMap
