diff --git a/interfaces.py b/interfaces.py
index 7c834f2..dc644db 100644
--- a/interfaces.py
+++ b/interfaces.py
@@ -657,7 +657,8 @@ class IPredicate(IConceptSchema):
         required=False)
 
 
-class IMappingAttributeRelation(IConceptSchema):
+# probably not useful
+class xxIMappingAttributeRelation(IConceptSchema):
     """ A relation based on a predicate ('mappingAttribute') that provides
         values for an attribute name on a parent and a corresponding
         identifiers on the the child objects that will be used as keys
diff --git a/predicate.py b/predicate.py
index a5189aa..79cf138 100644
--- a/predicate.py
+++ b/predicate.py
@@ -31,7 +31,7 @@ from zope.security.proxy import removeSecurityProxy
 from zope.traversing.api import getName
 
 from loops.interfaces import ILoopsObject, IConcept, IResource
-from loops.interfaces import IPredicate, IMappingAttributeRelation
+from loops.interfaces import IPredicate #, IMappingAttributeRelation
 from loops.concept import Concept
 from loops.common import AdapterBase
 from loops.type import TypeInterfaceSourceList
@@ -59,11 +59,11 @@ class PredicateInterfaceSourceList(TypeInterfaceSourceList):
 
 # standard relation adapters
 
-PredicateInterfaceSourceList.typeInterfaces += (IMappingAttributeRelation,)
+#PredicateInterfaceSourceList.typeInterfaces += (IMappingAttributeRelation,)
 
 
-class MappingAttributeRelation(AdapterBase):
+#class MappingAttributeRelation(AdapterBase):
 
-    implements(IMappingAttributeRelation)
+    #implements(IMappingAttributeRelation)
 
-    _contextAttributes = list(IMappingAttributeRelation)
+    #_contextAttributes = list(IMappingAttributeRelation)
diff --git a/tests/setup.py b/tests/setup.py
index 765b522..2102d1d 100644
--- a/tests/setup.py
+++ b/tests/setup.py
@@ -54,7 +54,7 @@ from loops.interfaces import ILoopsObject, IIndexAttributes
 from loops.interfaces import IDocument, IFile, ITextDocument
 from loops.organize.memberinfo import MemberInfoProvider
 from loops.organize.stateful.base import StatefulResourceIndexInfo, handleTransition
-from loops.predicate import Predicate, MappingAttributeRelation
+from loops.predicate import Predicate   #, MappingAttributeRelation
 from loops.query import QueryConcept
 from loops.query import QueryConcept
 from loops.resource import Resource, FileAdapter, TextDocumentAdapter
@@ -95,9 +95,9 @@ class TestSite(object):
         component.provideUtility(IntIdsStub())
         relations = RelationRegistry()
         relations.setupIndexes()
-        for idx in ('_attrName', '_attrIdentifier'):
-            if idx not in relations:
-                relations[idx] = FieldIndex(idx, IIndexableRelation)
+        #for idx in ('_attrName', '_attrIdentifier'):
+        #    if idx not in relations:
+        #        relations[idx] = FieldIndex(idx, IIndexableRelation)
         component.provideUtility(relations, IRelationRegistry)
 
         component.provideUtility(PrincipalAnnotationUtility(), IPrincipalAnnotationUtility)
@@ -115,7 +115,7 @@ class TestSite(object):
         component.provideAdapter(LoopsType)
         component.provideAdapter(ConceptType)
         component.provideAdapter(Predicate)
-        component.provideAdapter(MappingAttributeRelation)
+        #component.provideAdapter(MappingAttributeRelation)
         component.provideAdapter(ResourceType, (IDocument,))
         component.provideAdapter(TypeConcept)
         component.provideAdapter(QueryConcept)