[developers] variable type mapping as part of VPM

[Yi Zhang]

hi Stephan,

thanks for pointing this out. i will work on it next week.

best,
yi

On Thu, Aug 7, 2008 at 10:44 PM, Stephan Oepen <oe at ifi.uio.no> wrote:
> hi zhang yi,
>
> i am about to check in changes to the (Lisp) VPM code, to finally have
> the mappings from grammar-internal to MRS variables be part of the VPM
> too (such that, among other things, the mapping can be bidirectional).
> adding these to the ERG `semi.vpm' (see attachment), cheap complains:
>
>  Invalid line while reading vpm.
>
> the intention is that variable type mappings take the same form as the
> variable property mappings, but they occur outside a block of property
> name correspondencnes, i.e. before any X : Y statements.
>
> conceptually, this extension of the VPM makes the following obsolete, i
> believe:
>
>  mrs-event-type := event.
>  mrs-event-or-index-type := individual.
>  mrs-deg-ind-type := deg-ind.
>  mrs-non-expl-ind-type := non_expl-ind.
>  mrs-handle-type := handle.
>  mrs-ref-ind-type := ref-ind.
>  mrs-non-event-type := non_event.
>
> in the LKB, the old way of mapping variable types will remain available
> (for backwards compatibility, at least for some time), but for PET i am
> tempted to suggest we build the new MRS code without such legacy (other
> than the ERG, no grammars support native MRS mode in PET yet, i think)?
>
> either way, would you have time to extend the PET VPM implementation?
>
>                                                   best wishes  -  oe
>
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>
>