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Subject: Re: [xri] XRI tagging question

Yes this is interesting.. I sometimes have similar questions when
working with XDI. In XDI, we can put quite a few special "tags" into
the XRIs, e.g. timestamp, version, language, datatype, etc.

For example, version 2 of an e-mail address definition in english
language with a string type could look like this:


Or should it look like this?


The example may not be 100% correct, but it shows how we have been
trying to put "tags" into the XRIs, in a similar way Nika suggests.
The interesting questions are in which order should they be, how does
the parser know when the tags start, etc.

Also note that the examples are in the proposed 3.0 syntax, but of
course this applies to 2.0 as well.


On Tue, Nov 4, 2008 at 1:13 AM, Drummond Reed
<drummond.reed@cordance.net> wrote:
> Nika,
> I was travelling last week so I am just now catching up on list email. See
> inline below.
>> -----Original Message-----
>> From: Nika Jones [mailto:njones@ouno.com]
>> Sent: Thursday, October 30, 2008 9:08 AM
>> Subject: [xri] XRI tagging question
>> All:
>> One question about tagging in XRI. What should be considered a best
>> practice for tagging with metadata applied. For example in a project
>> we're working on now we would like to tag MP3s as (+mp3). So if we
>> wanted to include a snippet of an mp3 which would be considered a best
>> practice
>> @example*deposition/(+mp3/2:30/4:30)
>>   where 2:30sec is where the snippet starts and 4:30sec is where it
>> ends or
>> @example*deposition/(+mp3)/2:30/2
>> where 2:30sec is where the snippet starts and 2min is the length.
>> I intentionally mixed a specific endpoint vs a duration, to see if
>> there were any strong feelings one way or another (but it really
>> doesn't matter).
>> However the main question is should the stated endpoints or duration
>> be inside of the cross-reference tag or outside as a best practice??
> I honestly don't know if there is a "best practice" for this. What I do know
> is that this raises some great questions which will be addressed by a
> writeup I'm planning to do this week on the global-cross-reference proposal
> for XRI 3.0 to prepare for the F2F meeting next week.
> Ultimately I think we'll need a whiteboard at the F2F (or at IIW before it)
> to go through all the possibilities.
> Best,
> =Drummond
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