+/**
+ * \brief Trampoline for the callback function to reclaim the Query
+ * memory for a given Query.
+ *
+ * \param this is the specific \ref Query concerned.
+ *
+ * Ground queries recalim their own state memory. Composite
+ * queries first propagate the reclaim call to its components, and
+ * thereafter reclaim their local state memory.
+ */
+extern void Query_reclaim(Query *this);
+
+/**
+ * \brief Trampoline for the callback function to update the Binding
+ * table with a succession of alternative bindings.
+ *
+ * \param this is the specific \ref Query concerned.
+ *
+ * \param bt is the Binding table to set bindings in.
+ *
+ * \param s is the call "sub-command" for the function.
+ *
+ * \returns 1 if a new Binding is provided and 0 otherwise.
+ *
+ * This function is called repeatedly for successively obtaining
+ * the alternative bindings that satisfy the Query. The "initial"
+ * state sub-command tells the function to capture the incoming
+ * BindingTable state so that the function can later restore it
+ * upon the "restore" sub-command. Upon the "initial" command, the
+ * function also sets up the Binding table with its first Binding
+ * alternative. This is followed by a series of "subsequent"
+ * sub-command calls for the function to change the BindingTable
+ * for its succession of Binding alternatives. The function should
+ * return 1 after any successful Binding setup, and return 0 when
+ * it cannot setup any (more) Binding.
+ */
+extern int Query_next(Query *this,BindingTable *bt,enum NextState state);
+
+/**
+ * \brief Trampoline for the callback function that adds its binding
+ * names to the hashvector.
+ *
+ * \param this is the query concerned.
+ *
+ * \param hv is the HashVector for collating names.
+ */
+extern void Query_variables(Query *this,HashVector *hv);
+
+
+
+