diff --git a/src/Swish/QName.hs b/src/Swish/QName.hs
--- a/src/Swish/QName.hs
+++ b/src/Swish/QName.hs
@@ -12,8 +12,13 @@
 --  Stability   :  experimental
 --  Portability :  OverloadedStrings
 --
---  This module defines an algebraic datatype for qualified names (QNames).
+--  This module defines an algebraic datatype for qualified names (QNames),
+--  which represents a 'URI' as the combination of a namespace 'URI'
+--  and a local component ('LName'), which can be empty.
 --
+--  Although RDF supports using IRIs, the use of 'URI' here precludes this.
+--  There is currently no attempt to convert from an IRI into a URI.
+--
 --------------------------------------------------------------------------------
 
 -- At present we support using URI references rather than forcing an absolute
@@ -37,10 +42,11 @@
 
 import Control.Monad (liftM)
 
-import Data.String (IsString(..))
+import Data.Char (isAscii)
 import Data.Maybe (fromMaybe)
 import Data.Interned (intern, unintern)
 import Data.Interned.URI (InternedURI)
+import Data.String (IsString(..))
 
 import Network.URI (URI(..), URIAuth(..), parseURIReference)
 
@@ -63,6 +69,8 @@
 At present, the local name can not 
 contain spaces or the \'#\', \':\', or \'/\' characters. This restriction is
 experimental.
+
+The additional restriction of 'Data.Char.isAscii' was added in version @0.7.0.2@.
 -}
 newtype LName = LName T.Text
     deriving (Eq, Ord)
@@ -83,7 +91,8 @@
 
 -- | Create a local name.
 newLName :: T.Text -> Maybe LName
-newLName l = if T.any (`elem` " #:/") l then Nothing else Just (LName l)
+-- newLName l = if T.any (`elem` " #:/") l then Nothing else Just (LName l)
+newLName l = if T.any (\c -> c `elem` " #:/" || not (isAscii c)) l then Nothing else Just (LName l)
 
 -- | Extract the local name.
 getLName :: LName -> T.Text
diff --git a/src/Swish/RDF/Graph.hs b/src/Swish/RDF/Graph.hs
--- a/src/Swish/RDF/Graph.hs
+++ b/src/Swish/RDF/Graph.hs
@@ -62,7 +62,7 @@
     --                                
     -- | The 'ToRDFLabel' instance of 'ScopedName' can also be used                                     
     -- to easily construct 'RDFLabel' versions of the terms defined
-    -- in `Swish.RDF.Vocabulary`.
+    -- in "Swish.RDF.Vocabulary".
     
     -- ** RDF terms                                          
     --                                          
diff --git a/swish.cabal b/swish.cabal
--- a/swish.cabal
+++ b/swish.cabal
@@ -1,5 +1,5 @@
 Name:               swish
-Version:            0.7.0.1
+Version:            0.7.0.2
 Stability:          experimental
 License:            LGPL
 License-file:       LICENSE 
@@ -44,8 +44,14 @@
   .
   * Complete, ready-to-run, command-line and script-driven programs.
   .
-  Changes in version @0.7.0.0@:
+  Changes in version @0.7.0.2@:
   .
+  * The @Swish.QName.LName@ type now requires all characters to be
+  ASCII. This avoids downstream errors when trying to convert a
+  @QName@ to a @URI@.
+  .
+  Changes in version @0.7.0.1@:
+  .
   * Internal changes to parsing of URI values for NTriples, Turtle, and N3
   parsers (error messages will be slightly different when IRIs are used).
   Unfortunately IRIs are still not supported. 
@@ -469,6 +475,22 @@
  -- we do not have the data files to run this test
  Executable         SwishTest
    Main-Is:        tests/SwishTest.hs
+
+ -- How can we include data files that are only used for
+ -- benchmark/tests and do not get installed?
+ Benchmark            bench-ntriples
+   Type:             exitcode-stdio-1.0
+   Hs-Source-Dirs:   bench/
+   Other-Modules:    Paths_swish
+   Main-Is:          NTriples.hs
+   Build-Depends:    base,
+                     criterion,
+                     deepseq,
+                     network,
+                     swish,
+                     text
+
+   ghc-options:      -Wall -fno-warn-orphans
 
 Executable         Swish
    Main-Is:        SwishApp.hs