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Re: Problem with test pp28

From: Gregory Williams <greg@evilfunhouse.com>
Date: Mon, 11 Jun 2012 15:44:49 -0400
Cc: W3C SPARQL Working Group <public-rdf-dawg@w3.org>
Message-Id: <EDB2305C-D39D-4E82-9F21-0221BEF2A979@evilfunhouse.com>
To: Matthew Perry <matthew.perry@oracle.com>
On Jun 11, 2012, at 3:32 PM, Matthew Perry wrote:

> I think property path test pp28 may have an error. If '?' is a connectivity operator, then how is :z in the result twice?

'?' isn't just a connectivity operator -- it just adds results (the zero-length path results) to the path it is applied to (in this case, ':p/:p'). And since :p/:p just expands to a BGP, you get the doubled results since :z can be reached twice from :a (through either :b or :c).

Received on Monday, 11 June 2012 19:45:39 UTC

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