[LFG] XLE RULES formalism question

[Ron Kaplan]

Hi Damir,

This is something else.  This is defining ADVERBIAL as a meta-category whose right-side regular expression gets substituted into other rules in place of ADVERBIAL.  This is used to express grammatical generations (patterns shared by several rules) without constructing an extra level in the c-structure.  This, along with the related macro definitions, is for c-structure expansions what templates are for f-structure generalizations.

These are described  in the XLE documentation.

--Ron

> On Sep 27, 2016, at 9:57 AM, Damir Cavar <damir at linguistlist.org> wrote:
> 
> Hi everybody,
> 
> I have a question with respect to the XLE grammar RULES section. We found in some grammar the following definitions in the RULES section:
> 
> ADVERBIAL = { PP: ! $ (^ ADJUNCT); 
>           | AdvP: ! $ (^ ADJUNCT); 
>           | DP: ! $ (^ ADJUNCT) 
>                 (! PSEM) =c temp ;
>           | CP: ! $ (^ ADJUNCT) 
>                 (! ADJUNCT $ GLOSS TRANS) = if }
>           (INTERNALPUNCT).
> 
>    PREPOBJ = { PP: (^ OBJ) = ! 
>           | DP: (^ OBJ) = ! }.
> 
> 
> Is the “=“ in these rules equivalent to “—>” or is this something else. What is the semantics, if these two are different? In the documentation I have not seen the use of “=“. Is there some more detailed or extended documentation that goes into more such details?
> 
> 
> Thanks a lot!
> 
> DC
> 
> 
> 
> 
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