X-Git-Url: http://nitlanguage.org

diff --git a/src/model/mdoc.nit b/src/model/mdoc.nit
index 2f8d045..261fafe 100644
--- a/src/model/mdoc.nit
+++ b/src/model/mdoc.nit
@@ -16,6 +16,7 @@
 module mdoc
 
 import model_base
+import location
 
 # Structured documentation of a `MEntity` object
 class MDoc
@@ -27,17 +28,25 @@ class MDoc
 	# The entity where the documentation is originally attached to.
 	# This gives some context to resolve identifiers or to run examples.
 	var original_mentity: nullable MEntity = null is writable
+
+	# The original location of the doc for error messages
+	var location: Location
 end
 
 redef class MEntity
 	# The documentation associated to the entity
-	var mdoc: nullable MDoc is writable
+	var mdoc: nullable MDoc = null is writable
 
 	# The documentation associated to the entity or their main nested entity.
 	#
-	# MProject fall-back to their root MGroup
-	# MGroup fall-back to their default_mmodule
-	# Other entities do not fall-back
+	# * `MPackage`s fall back to their root `MGroup`.
+	# * `MGroup`s fall back to their `default_mmodule`.
+	# * `MClass`es, `MClassDef`s, `MProperty`s and `MPropDef`s fall-back to
+	#   their introducing definition.
+	# * `MClassType`s fall back to their wrapped `MClass`.
+	# * `MVirtualType`s fall back to their wrapped `MProperty`.
+	# * `CallSite` fall back on the wrapped `MProperty`.
+	# * Other entities do not fall back.
 	#
 	# One may use `MDoc::original_mentity` to retrieve the original
 	# source of the documentation.