ZODB grows its own zodb3.map.

releases/ZODB3/zodb3.map

+# These packages are used to provide the standalone ZODB distribution.
+# This package map can be addressed as
+#
+#   svn://svn.zope.org/repos/main/ReleaseSupport/trunk/PackageMaps/zodb3.map
+
+# This is the ZODB3 release package:
+#
+ZODB3           svn://svn.zope.org/repos/main/ZODB/tags/*/releases/ZODB3
+
+# This group is maintained as part of the ZODB project:
+#
+BTrees          svn://svn.zope.org/repos/main/ZODB/tags/*/src/BTrees
+Persistence     svn://svn.zope.org/repos/main/ZODB/tags/*/src/Persistence
+persistent      svn://svn.zope.org/repos/main/ZODB/tags/*/src/persistent
+transaction     svn://svn.zope.org/repos/main/ZODB/tags/*/src/transaction
+ThreadedAsync   svn://svn.zope.org/repos/main/ZODB/tags/*/src/ThreadedAsync
+ZEO             svn://svn.zope.org/repos/main/ZODB/tags/*/src/ZEO
+ZODB            svn://svn.zope.org/repos/main/ZODB/tags/*/src/ZODB
+ZopeUndo        svn://svn.zope.org/repos/main/ZODB/tags/*/src/ZopeUndo
+zope            svn://svn.zope.org/repos/main/ZODB/tags/*/src/zope
+
+# These are copied in from the Zope3 project; they are needed for ZODB
+# 3.4 and newer:
+#
+zope.interface  svn://svn.zope.org/repos/main/Zope3/tags/ZopeX3-3.0.0-Zope-2.8-a3/src/zope/interface
+zope.testing    svn://svn.zope.org/repos/main/Zope3/tags/ZopeX3-3.0.0-Zope-2.8-a3/src/zope/testing
+
+# These are copied in from the ZConfig and zdaemon projects:
+#
+ZConfig         svn://svn.zope.org/repos/main/ZODB/tags/*/src/ZConfig
+zdaemon         svn://svn.zope.org/repos/main/ZODB/tags/*/src/zdaemon