diff -r b4728112625f -r b21ee900c732 entity.py
--- a/entity.py	Tue Feb 17 22:45:55 2009 +0100
+++ b/entity.py	Tue Feb 17 22:59:14 2009 +0100
@@ -9,7 +9,7 @@
 from logilab.common import interface
 from logilab.common.compat import all
 from logilab.common.decorators import cached
-from logilab.mtconverter import TransformData, TransformError
+from logilab.mtconverter import TransformData, TransformError, html_escape
 
 from rql.utils import rqlvar_maker
 
@@ -18,11 +18,16 @@
 from cubicweb.rset import ResultSet
 from cubicweb.selectors import yes
 from cubicweb.appobject import AppRsetObject
+from cubicweb.schema import RQLVocabularyConstraint, RQLConstraint, bw_normalize_etype
 from cubicweb.common.registerers import id_registerer
-from cubicweb.common.uilib import printable_value, html_escape, soup2xhtml
-from cubicweb.common.mixins import MI_REL_TRIGGERS
-from cubicweb.common.mttransforms import ENGINE
-from cubicweb.schema import RQLVocabularyConstraint, RQLConstraint, bw_normalize_etype
+
+try:
+    from cubicweb.common.uilib import printable_value, soup2xhtml
+    from cubicweb.common.mixins import MI_REL_TRIGGERS
+    from cubicweb.common.mttransforms import ENGINE
+except ImportError:
+    # missing -common
+    MI_REL_TRIGGERS = {}
 
 _marker = object()