Obscure section 5.2.3.4 and concept of "interaction model"

Hello,

Section 5.2.3.4 specifies that server “MUST honor the client’s requested
interaction model(s)”. Sections 4.2.1.4 and 5.2.1.4 are linked for the two
mentioned interaction models. These two sections specify a response header
that the server should send in reponse to indicate that a resource is an
LDPR respectively an LDPC.

What confuses me is:

   -

   I don’t find a proper definition of “interaction model”. Apart from
   section 5.2.3.4 it is only mentioned once in the introduction.
    -

   In a normative section about requests I’m pointed to a section defining
   response headers
    - LDPC is a subtype of LDPR (see Fig. 3). So for an LDPR it shouldn’t
   be wrong to specify the LDPR “interaction model”. However the sentence
   “request header specifies a LDPR interaction model
   <http://www.w3.org/TR/ldp/#ldpr-gen-linktypehdr>, then the server MUST
   handle subsequent requests to the newly created resource’s URI as if it is
   a LDPR. (even if the content contains an rdf:type triple indicating a type
   of LDPC).” sound as if LDPC and LDPR are disjoint classes.

Cheers,
Reto
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