CCG is governed by a set of meta-rules which are commonly called "Principles". E.g.

  • the Combinatory Projection Principle (CPP)

  • the Projective Dependency Principle (PDP)

I have found most descriptions of these principles somewhat lacking in accessibility, something I can also say about discussions of why they are a good choice or trade-off in the limitations they impose.

Can you propose a very self-contained explanation of these principles, drawing as little as possible from earlier terminology?

  • Apologies to anyone coming here by the tags. There's no CCG tag on this community to constrain the audience.
    – Matan
    Aug 12 '17 at 18:19
  • The PDP means that the trees induced by categorial heads are projective (nontangled) which is a graph-theoretic notion meaning that no dependent can slip in between two higher nodes connected by an arc.
    – Atamiri
    Aug 13 '17 at 9:57

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