Add comments re inline and tree representations

draft-ietf-netmod-schema-mount.org

@@ -660,6 +660,28 @@ The first two requirements seem rather restrictive. On the other hand,
 the last one is difficult to guarantee - for example, things can break
 after an augment within the mounted schema.
 
+** Tree Representations
+
+Need to decide on how to represent mount points in trees.
+
+** Design Time Mounts
+
+The document currently doesn't allow for design time mounts. Design time
+mounts have been identified as possibly for multiple cases, and it may
+be worthwhile to identify a minimum or complete set of modules that must
+be supported under a mount point. This could be used in service modules
+that want to allow for configuration of device-specific information.
+The document could be modified to either (a) not preclude design time
+mounts, but not fully specify their support, or (b) fully define their
+support. 
+
+Also if/when design time mounts are supported, it could be possible to
+represent both mounts points and their required modules in tree
+representations and support for such would need to be defined. For
+example, YANG library is required under all inline mount points, and
+it's possible that other mounted schemes could be required at parent
+module design time. 
+
 {{document:
     name ;
     ipr trust200902;