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Re: Use case: OrderTracking-Shipping

From: Eric Prud'hommeaux <eric@w3.org>
Date: Thu, 25 Mar 2004 20:32:06 -0500
To: Rob Shearer <Rob.Shearer@networkinference.com>
Cc: RDF Data Access Working Group <public-rdf-dawg@w3.org>
Message-ID: <20040326013206.GG13553@w3.org>

On Thu, Mar 25, 2004 at 08:25:46PM -0500, Eric Prud'hommeaux wrote:
> FredCo sells a variety of products to consumers and maintains an order
> tracking database to track customer orders. The database is a
> conventional relational database with a schema normalized for their
> application

Each day, the shipping department packages and address the previous
day's orders. The address used comes from the shipping address
provided with this order but defaults to the customer's billing
address if none was provided.

This use case demonstrates a use of optional arcs in DAWG-QL. The
implementation, OrderTracking4-alg.sh [1], demonstrates translating
these to outer joins in SQL.

> [1] http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/OrderTracking4-alg.sh?rev=HEAD&content-type=text/x-cvsweb-markup
-- 
-eric

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