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+--1 Topological structure of Scandinavian sentences.
+--
+-- This is an alternative, more 'native' analysis than $Clause$ and
+-- $Verbphrase$, due to Diderichsen.
+--
+-- Sources:
+--   N. Jörgensen & J. Svensson, "Nusvensk grammatik" (Gleerups, 2001);
+--   R. Zola Christensen, "Dansk grammatik for svenskere"
+--   (Studentlitteratur 1999).
+
+abstract Sats = Categories ** {
+
+-- Idea: form primarily a $Sats$, which can then be lifted to a $Cl$
+-- and used elsewhere in grammar.
+
+  cat Sats ;
+
+  fun
+  ClSats : Sats -> Cl ;
+
+-- There will be $Sats$-forming functions for all subcategorization
+-- patterns of verbs.
+
+  SatsV   : NP -> V  -> Sats ;
+  SatsV2  : NP -> V2 -> NP -> Sats ;
+  SatsV3  : NP -> V3 -> NP -> NP -> Sats ;
+  SatsReflV2 : NP -> V2 -> Sats ;
+  SatsVS  : NP -> VS -> S -> Sats ;
+  SatsVQ  : NP -> VQ -> QS -> Sats ;
+  SatsV2S : NP -> V2S -> NP -> S -> Sats ;
+  SatsV2Q : NP -> V2Q -> NP -> QS -> Sats ;
+
+  SatsAP  : NP -> AP -> Sats ;
+  SatsCN  : NP -> CN -> Sats ;
+  SatsNP  : NP -> NP -> Sats ;
+  SatsAdv : NP -> Adv -> Sats ;
+
+-- To a $Sats$, you can insert a sentence adverbial ($AdV$, e.g. "ändå") or
+-- 'TSR' adverbial ($Adv$, e.g. "nu"; the name TSR is from Jörgensen
+-- and Svensson).
+
+  AdVSats : Sats -> AdV -> Sats ;
+  AdvSats : Sats -> Adv -> Sats ;
+
+-- We can also insert a verb-complement verb.
+
+  VVSats  : Sats -> VV -> Sats ;
+
+}