Topology of DTRS - reference sought

[Steve Harlow]

I have a strong recollection of reading a paper which proposed changing the
topology of the HPSG DAUGHTERS attribute to something like the following

HEAD-DTR  [1]
NON-HD-DTRS [2]
DRTS [1] o [2]

I am unfortunately unable to recall the details of the source of this
proposal. Can anyone help?

-Steve
--
SJ Harlow            sjh1 at york.ac.uk            Head of Department
Department of Language & Linguistic Science,    University of York
Heslington, York YO1 5DD, UK
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