CP-REL

Locative relative clauses like "þar sem", "þaðan sem", "þangað sem" are treated according to the PPCME2 guidelines for "There relatives":

Quoting from the PPCME2/PPCEME guidelines (http://www.ling.upenn.edu/~beatrice/annotation/):

THERE relatives

In the absence of both an antecedent and a complementizer, THERE relatives are treated as free relatives.

(ADVP-LOC (CP-FRL (WADVP (ADV there))

                 (C 0)
                 (IP-SUB ...))

Relatives introduced by THERE and containing a complementizer (AS, THAT) are treated analogously to SE +TE relatives. THERE is treated as the antecedent unless another antecedent is present, in which case THERE occupies the wh- position and is labelled WADVP.

(ADVP-LOC (ADV there)

         (CP-REL (WADVP 0)
                 (C as/that)
                 (IP-SUB ...)))

(ADVP-LOC (ADV there)

         (CP-REL (WADVP there)
                 (C as/that/0)
                 (IP-SUB ...)))

(NP (D the) (N place)

   (CP-REL (WADVP (ADV there))
           (C as/that/0)
           (IP-SUB ...)))

( (IP-IMP (CONJ And)

         (ADVP-TMP (ADV +tanne))
         (PP (P wit)
             (NP (Q alle) (N reuerence)))
         (VBI beklep)
         (NP-OB1 (Q sum) (N party)
                 (PP (P of)
                     (NP (D+ADJ +tilke) (ADJ swete) (N stalle)		← NP THERE
                         (CP-REL (WADVP-1 (ADV +ter))
                                 (C 0)
                                 (IP-SUB (NP-SBJ (PRO$ +ty) (ADJ +gunge) (N husbonde))
                                         (VBP ly+t)
                                         (PP (P in)
                                             (ADVP *T*-1)))))))
         (. ,))
 (ID CMAELR3,40.420))