--- a/Method.st	Wed Feb 15 16:56:24 2017 +0100
+++ b/Method.st	Wed Feb 15 17:45:26 2017 +0100
@@ -2708,10 +2708,9 @@
     "returns true, if this method only used for compatibility
      and should use only when porting foreign code but not otherwise"
 
-    |res|
-
-    ^ self package == #'stx:libcompat'
-      or:[(res := self resources) notNil and:[res includesKey:#compatibility]]
+    ^ (self package == #'stx:libcompat') or:[self isTaggedAs:#compatibility]
+
+    "Modified: / 15-02-2017 / 17:16:10 / cg"
 !
 
 isInvalid
@@ -2774,9 +2773,9 @@
 isObsolete
     "returns true, if this method is obsolete and should not be used any longer"
 
-    |res|
-
-    ^ (res := self resources) notNil and:[res includesKey:#obsolete]
+    ^ self isTaggedAs:#obsolete
+
+    "Modified: / 15-02-2017 / 17:15:25 / cg"
 !
 
 isShadowingExtension
@@ -2797,6 +2796,16 @@
     "Modified (comment): / 01-02-2017 / 16:58:39 / stefan"
 !
 
+isTaggedAs:tag
+    "returns true, if this method has a <resource: tag> annotation"
+
+    |res|
+
+    ^ (res := self resources) notNil and:[res includesKey:tag]
+
+    "Created: / 15-02-2017 / 17:15:15 / cg"
+!
+
 isVersionMethod
     "Return true, if this is a CVS, SVN or other version method.
      Stupid: need to know all of them here; better add a pragma or