[tmql-wg] Result set requirements

[Dmitry]

>
> Introducing all TMDM data structures would probably add another
> type dimension into TMQL.
>
> --
>
> One option we have is to treat this as "language pragma"
>
>   pragma INTERFACE_MODEL (TMDM)
>   return $t/bn   # returns basename item
>
>   pragma INTERFACE_MODEL (simple)
>   return $t/bn   # return string
>
>   pragma INTERFACE_MODEL (maplet)
>   return $t      # returns topic as part of a maplet
>
> only allowed on the outest level so that it does not affect language
> semantics, but only interface semantics.
>
> Or, to choose a reasonable default and use 'ATTRIBUTE'
> (meta-information on data):
>
>   return $t/bn'TMDM   # returns basename as item
>   return $t/bn        # default is stringification
>   return $t/bn'VALUE  # same
>
> \rho
>

I personally prefer explicit XQuery-like constructors.

We can have constructors for XML, lists and Topic Maps as default set.

And we can allow to provide additional set of constructors (wiki pages, 
for example)

Constructors, I think, can be mixed with any "select" query language.

Dmitry