+typedef std::map<std::string, XLineFactory*> XLineFactMap;
+
+/** A map of XLines indexed by string
+ */
+typedef std::map<std::string, XLine *> XLineLookup;
+
+/** A map of XLineLookup maps indexed by string
+ */
+typedef std::map<std::string, XLineLookup > XLineContainer;
+
+/** An iterator in an XLineContainer
+ */
+typedef XLineContainer::iterator ContainerIter;
+
+/** An interator in an XLineLookup
+ */
+typedef XLineLookup::iterator LookupIter;
+
+/** XLineManager is a class used to manage glines, klines, elines, zlines and qlines,
+ * or any other line created by a module. It also manages XLineFactory classes which
+ * can generate a specialized XLine for use by another module.
+ */
+class CoreExport XLineManager : public classbase