/**
* Returns a command to ask the viewer to close down
+ *
* @return
*/
StructureCommandI closeViewer();
+
+ /**
+ * Returns one or more commands to ask the viewer to notify model or selection
+ * changes to the given uri. Returns null if this is not supported by the
+ * structure viewer.
+ *
+ * @param uri
+ * @return
+ */
+ List<StructureCommandI> startNotifications(String uri);
+
+ /**
+ * Returns one or more commands to ask the viewer to stop notifying model or
+ * selection changes. Returns null if this is not supported by the structure
+ * viewer.
+ *
+ * @return
+ */
+ List<StructureCommandI> stopNotifications();
+
+ /**
+ * Returns a command to ask the viewer for its current residue selection, or
+ * null if no such command is supported
+ *
+ * @return
+ */
+ StructureCommandI getSelectedResidues();
+
+ /**
+ * Returns a command to list the unique names of residue attributes, or null
+ * if no such command is supported
+ *
+ * @return
+ */
+ StructureCommandI listResidueAttributes();
+
+ /**
+ * Returns a command to list residues with an attribute of the given name,
+ * with attribute value, or null if no such command is supported
+ *
+ * @return
+ */
+ StructureCommandI getResidueAttributes(String attName);
}