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Official response to ISSUE-164: @reverse algorithm is buggy

From: Manu Sporny <msporny@digitalbazaar.com>
Date: Wed, 23 Oct 2013 07:01:13 -0400
Message-ID: <5267AC79.2070106@digitalbazaar.com>
To: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
CC: RDF WG Comments <public-rdf-comments@w3.org>
Hi Pierre-Antoine,

Thank you for your feedback on the JSON-LD specifications. This is an
official response to ISSUE-164: @reverse algorithm is buggy, which is
being tracked here:


You had previously reported an issue with one of the JSON-LD Algorithms
that dealt with @reverse properties. Specifically, you mentioned that
the behavior of the algorithms was confusing when utilizing the @reverse
keyword in certain scenarios.

Gregg and Markus asserted that this was a bug in the specification, and
the group agreed after discussing the issue here:


and resolved to fix the bug using an algorithm that Markus proposed:


We now have at least 5 implementations that have applied the fix that
Markus proposed and feel comfortable that the change addresses the
concern that you raised. That you were able to find and report this bug
now is exactly the reason we have a Candidate Recommendation phase in
the W3C Process. Thank you for reporting the issue when you did. :)

We believe that this addresses the issue that you reported and the
implementers are happy with the change to the specification that fixes
the bug in the algorithm. Please respond as soon as possible to this
email to tell us whether or not you are satisfied with the decision of
the group.

-- manu

Manu Sporny (skype: msporny, twitter: manusporny, G+: +Manu Sporny)
Founder/CEO - Digital Bazaar, Inc.
blog: Meritora - Web payments commercial launch
Received on Wednesday, 23 October 2013 11:59:59 UTC

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