1 files changed, 9 insertions, 0 deletions
diff --git a/lib/sisu/v3/sysenv.rb b/lib/sisu/v3/sysenv.rb
index c22f878c..6d010c76 100644
--- a/lib/sisu/v3/sysenv.rb
+++ b/lib/sisu/v3/sysenv.rb
@@ -440,6 +440,15 @@ module SiSU_Env
       def multilingual?
         by_language_code?
       end
+      def by?
+        by=if by_language_code?
+          'language'
+        elsif by_filetype?
+          'filetype'
+        else
+          'filename'
+        end
+      end
       self
     end
     def document_language_versions_found #REVISIT