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RE: Network Transfer Syntax

From: Seaborne, Andy <andy.seaborne@hp.com>
Date: Tue, 20 Jul 2004 17:50:00 +0100
Message-ID: <E864E95CB35C1C46B72FEA0626A2E80803984A5E@0-mail-br1.hpl.hp.com>
To: "Thompson, Bryan B." <BRYAN.B.THOMPSON@saic.com>, public-rdf-dawg@w3.org

-------- Original Message --------
> From: Thompson, Bryan B. <>
> Date: 20 July 2004 17:35
> Andy,
> Is this just the "transfer" syntax for query expressions?  So, if we are
> doing a bookmarkable
> query, then this would be the query string?
> -bryan

Yes - its the serialization of the query on the wire.  To send a query from
one machine to another, it has to be serialized.

For a GET? based protocol, it would be (part of) the query string. With the
N3QL (service-oriented view) it would be the whole thing, with the RDF Web
API (model oriented), there would be a parameter with the query string.  All
hex encoded of course.  The WG may yet decide there there are protocol
parameters to be carried outside the query serialization.


> -----Original Message-----
> From: public-rdf-dawg-request@w3.org
> [mailto:public-rdf-dawg-request@w3.org] 
> On Behalf Of Seaborne, Andy
> Sent: Tuesday, July 20, 2004 7:00 AM
> To: public-rdf-dawg@w3.org
> Subject: Network Transfer Syntax
> An important value having a W3C recommendation in this area is to enable
> interoperation of independently developed systems.  For me, the fact the
> name is "data access" is key - it is providing the ability of one
> system to 
> access information on another system without needing to know the
> specific 
> details of how the remote system is implemented.  An important aspect of
> this is the network transfer syntax (also known as the on-the-wire
> syntax). 
> The network transfer syntax (NTS) does not have to be the syntax
> presented 
> to the application writer.  This is particularly true if we have several
> presentation syntaxes of a common abstract query capability (we have 3
> so 
> far).  Each presentation syntax would be targeted at a specific
> environment 
> or usage (they may not even be syntaxes but programmatic APIs).
> But it really does help to have one single network syntax.  This
> serialization of the query language should be reasonably compact, be
> able to 
> represent the full range of query capabilities and be easy to parse to
> extract the abstract query syntax.
> Local query would not need to go through the NTS, it could remain in the
> application presentation syntax.
> Dan's limited complexity requirement seems most important here.  While
> any 
> presentation syntax will need to provide features that are good for its
> environment (e.g. business logic formatting requirements) that does not
> mean 
> that the NTS, the data access language, should have those capabilities
> when 
> NTS is passing across system and administration boundaries.
> 	Andy
Received on Tuesday, 20 July 2004 12:52:01 UTC

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