diff --git a/haskell-neo4j-client.cabal b/haskell-neo4j-client.cabal
--- a/haskell-neo4j-client.cabal
+++ b/haskell-neo4j-client.cabal
@@ -1,5 +1,5 @@
 name:                haskell-neo4j-client
-version:             0.2.3.0
+version:             0.2.4.0
 synopsis:            A Haskell neo4j client
 description:         
     Library to interact with Neo4j databases. For now, its API covers basic operations for nodes, relationships, labels
diff --git a/src/Database/Neo4j.hs b/src/Database/Neo4j.hs
--- a/src/Database/Neo4j.hs
+++ b/src/Database/Neo4j.hs
@@ -23,14 +23,15 @@
     Val(..), PropertyValue(..), newval, (|:), Properties, emptyProperties, getProperties, getProperty, setProperties,
         setProperty, deleteProperties, deleteProperty, 
     -- * Managing nodes
-    Node, getNodeProperties, createNode, getNode, deleteNode, nodeId, nodePath, runNodeIdentifier, NodeIdentifier,
+    Node, getNodeProperties, createNode, getNode, deleteNode, nodeId, nodePath, runNodeIdentifier, NodeIdentifier(..),
     NodePath,
     -- * Managing relationships
     Relationship, Direction(..), RelationshipType, createRelationship, getRelationship, deleteRelationship,
         getRelationships, relId, relPath, allRelationshipTypes, getRelProperties, getRelType, runRelIdentifier,
-        getRelationshipFrom, getRelationshipTo, RelIdentifier, RelPath,
+        getRelationshipFrom, getRelationshipTo, RelIdentifier(..), RelPath,
     -- * Managing labels and getting nodes by label
-    EntityIdentifier, Label, allLabels, getLabels, getNodesByLabelAndProperty, addLabels, changeLabels, removeLabel,
+    EntityIdentifier(..), Label, allLabels, getLabels, getNodesByLabelAndProperty, addLabels, changeLabels,
+    removeLabel,
     -- * Indexes
     Index(..), createIndex, getIndexes, dropIndex,
     -- * Exceptions