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RE: Uniform access to metadata: XRD use case.

From: Larry Masinter <masinter@adobe.com>
Date: Wed, 11 Mar 2009 16:38:51 -0700
To: Eran Hammer-Lahav <eran@hueniverse.com>, Jonathan Rees <jar@creativecommons.org>, "connolly@w3.org" <connolly@w3.org>
CC: "www-archive@w3.org" <www-archive@w3.org>
Message-ID: <8B62A039C620904E92F1233570534C9B0118C88261A9@nambx04.corp.adobe.com>
My perspective is that all video and audio formats commonly used on the Internet allow for embedded metadata.
Yes, there are formats that don't.

Yes, there are formats for which it is difficult, and perhaps it is "limited", but the question is whether the limitation is practical or abstract.

Larry
--
http://larry.masinter.net

From: Eran Hammer-Lahav [mailto:eran@hueniverse.com]
Sent: Wednesday, March 11, 2009 4:27 PM
To: Larry Masinter; Jonathan Rees; connolly@w3.org
Cc: www-archive@w3.org
Subject: Re: Uniform access to metadata: XRD use case.

Well, all this shows is that you can embed *some* metadata. But that is limited to what the spec authors needed at the time the format was created.

EHL


On 3/11/09 3:21 PM, "Larry Masinter" <masinter@adobe.com> wrote:
> First, not all representations are capable of embedding such metadata (i.e.
> video, audio, etc.).

Your other points notwithstanding, a minor correction to your examples, since it is possible and quite common to embed metadata in video and audio:


http://www.adobe.com/devnet/xmp/

"Part 3, Storage in Files (PDF, 629k) , provides information about how serialized XMP metadata is packaged into XMP Packets and embedded in different file formats. It includes information about how XMP relates to and incorporates other metadata formats, and how to reconcile values that are represented in multiple metadata formats."

Note also availability of free open source implementation:

The XMP Toolkit allows you to integrate XMP functionality into your product or solution. It supports Macintosh, Windows, as well as UNIX and comes with samples, documentation, source code and project files. The XMP Toolkit is available under the BSD license. The specification is provided under the XMP Specification Public Patent License (PDF, 24k).


Larry
--
http://larry.masinter.net
Received on Wednesday, 11 March 2009 23:40:00 UTC

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