diff --git a/nidm/experiment/Navigate.py b/nidm/experiment/Navigate.py
index 7fb9a597..3b655fd8 100644
--- a/nidm/experiment/Navigate.py
+++ b/nidm/experiment/Navigate.py
@@ -334,6 +334,14 @@ def GetDataelements(nidm_files_tuple):
                 result['data_elements']['label'].append(str(dti['label']))
                 result['data_elements']['data_type_info'].append( dti )
                 found_uris.add(de_uri)
+        # find all the datatypes
+        for de_uri in rdf_graph.subjects(predicate=isa, object=Constants.NIDM['PersonalDataElement']):
+            if de_uri not in found_uris:  # don't add duplicates
+                dti = getDataTypeInfo(rdf_graph, de_uri)
+                result['data_elements']['uuid'].append(str(dti['dataElementURI']))
+                result['data_elements']['label'].append(str(dti['label']))
+                result['data_elements']['data_type_info'].append(dti)
+                found_uris.add(de_uri)
 
     # now look for any of the CDEs
     all_predicates = GetAllPredicates(nidm_files_tuple)
diff --git a/nidm/experiment/Query.py b/nidm/experiment/Query.py
index 9c5dda50..9d421186 100644
--- a/nidm/experiment/Query.py
+++ b/nidm/experiment/Query.py
@@ -1117,6 +1117,9 @@ def getDataTypeInfo(source_graph, datatype):
     # check to see if the datatype is in the main graph. If not, look in the CDE graph
     if source_graph and  (expanded_datatype, isa, Constants.NIDM['DataElement']) in source_graph:
         rdf_graph = source_graph
+    # check if datatype is a personal data element
+    elif source_graph and  (expanded_datatype, isa, Constants.NIDM['PersonalDataElement']) in source_graph:
+        rdf_graph = source_graph
     else:
         rdf_graph = nidm.experiment.CDE.getCDEs()
 
diff --git a/nidm/version.py b/nidm/version.py
index 2eb50fe6..0f89f5ca 100644
--- a/nidm/version.py
+++ b/nidm/version.py
@@ -4,7 +4,7 @@
 # Format expected by setup.py and doc/source/conf.py: string of form "X.Y.Z"
 _version_major = 3
 _version_minor = 8 
-_version_micro = '3'  # use '' for first of series, number for 1 and above
+_version_micro = '4'  # use '' for first of series, number for 1 and above
 _version_extra = ''
 # _version_extra = ''  # Uncomment this for full releases