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diff --git a/core/src/Text/Edifact/Common.hs b/core/src/Text/Edifact/Common.hs
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+{-|
+Module      : Text.Edifact.Common
+Description : Common syntax
+
+This module should handle the main revision of the Edifact specification, which
+covers UN* segments.
+
+Currently it barely covers the revision 3 and this has not been scaffolded.
+
+One future evolution will be to scaffold the various revisions from a more
+general specification.
+ -}
+module Text.Edifact.Common
+  (
+    -- * Routine
+    parseFull
+
+    -- * Reexports
+  , ParseError
+  , Parser
+  , Text
+  ) where
+
+import           Text.Edifact.Parsing
+import           Text.Edifact.Parsing.Commons
+
+import           Text.Edifact.Common.Segments
+
+import           Data.Text                    (Text)
+
+parseFull :: Parser value -> Text -> Either ParseError value
+parseFull = parse . fullSyntaxParser
+
+fullSyntaxParser :: Parser a -> Parser a
+fullSyntaxParser messageParser =
+  segmentUNA >>
+  tries [ segmentUNB *> messageParser <* segmentUNZ
+        , messageParser
+        ]