--- a/UnixFilename.st	Mon Sep 08 20:10:04 1997 +0200
+++ b/UnixFilename.st	Tue Sep 09 04:57:04 1997 +0200
@@ -18,6 +18,20 @@
     "Created: 8.9.1997 / 00:13:14 / cg"
 !
 
+isCaseSensitive
+    "return true, if filenames are case sensitive.return true, if filenames are case sensitive."
+
+    ^ true
+!
+
+parentDirectoryName
+    "return the name used for the parent directory.
+     This is '..' for unix and dos-like systems.
+     (there may be more in the future."
+
+    ^ '..'
+!
+
 separator
     "return the file/directory separator."
 
@@ -74,7 +88,7 @@
 
 constructString:subname
     "taking the receiver as a directory name, construct a new
-     filenames string for an entry within this directory 
+     filename-string for an entry within this directory 
      (i.e. for a file or a subdirectory in that directory)."
 
     |sepString|