[Versa] More on literal queries

[Michael Olson]

On Sep 13, 2005, at 1:50 PM, Uche Ogbuji wrote:

> On Tue, 2005-09-13 at 13:30 -0600, Michael Olson wrote:
>>>> Just to be clear, your not talking about a "context" as shown in the
>>>> above EBNF correct?  In the EBNF, context is the ".".  I've been
>>>> trying
>>>> to talk about the "scope" of an expression which I think is what you
>>>> mean.
>>>
>>> I should be explicit.  When I said context, I mainly meant the idea  
>>> of
>>> a subgraph (possibly named).  But there are three interpretations, as
>>> I see it:
>>>
>>
>> So, lets try and give them names that are not so confusing.
>>
>>> - Context:  A named subgraph In the pure RDF sense (the scope
>>> attribute on 4RDF Statements)
>>>
>>
>> Scope.
>
> Nah.  We'd be alone in this.
>
>>> - Versa Context:  Consisting of a core data type, variable bindings,
>>> namespace declarations, and a named Context (subgraph)
>>>
>>
>> Context.
>
> I think this would be too confusing, which is why I suggested "query
> state".

OK.

>
>>> - The '.' Expression: Shorthand for the the data type instance
>>> associated with the current Versa Context
>>>
>>
>> This can be "current" from the XPath spec.
>
> Except that it's not current().  Remember that "." and "current()" are
> quite different in XPath.  More confusion.
>

Right, I forgot.  I still think we need the "." though, otherwise it  
feels to much like "magic" that (!x : $x) returns what "." used to.

Maybe we just call it "dot"

Mike

>
> --  
> Uche Ogbuji                               Fourthought, Inc.
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Mike Olson                                                Principal  
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