Re: Temporal validitity of subject indicators?

Robert,

On 5/8/2011 12:49 PM, Robert Cerny wrote:
> Patrick,
>
> Am 08.05.2011 um 17:42 schrieb Patrick Durusau:
>
>> I am intrigued by your:
>>> since you can always add a glue map, while it is impossible to get the mess apart.
>> Why so?
>>
>> Shouldn't I be about to "undo" a merge like I do editing?
> The mess is not caused by a merge operation, the mess is caused because a person reuses but misunderstands a (foreign) subject identifier and attaches statements to a topic which they actually do not belong to. Once both interpretations reach the Topic Maps ecosystem (great term, Andrew!), the damage is done. This you cannot undo no matter how smart you conceive your software, because the software is doing everything right. The human makes the error. Under very special circumstances a correction might be possible, but not in the general case.
>
Ah, sorry, I mis-read your complaint.

What you mean to say is that we only have the grouping of subject 
identifiers and we lack a mechanism to *exclude* a subject identifier.

Is that the problem?

Why can't I use TMCL 7.3 Subject Identifier Constraint, the regex to 
exclude the faulty subject identifier?

After all, it says "shall match...."

I suppose I could have several constraints on the same topic, just in 
case I had multiple subject identifiers I wanted to allow.

Would be more elegant to allow a regex to exclude subject identifiers 
but that can await a future version.

> Needless to say that these problems apply to any form of reusing foreign identifiers, so it also concerns the Linked Data technology. I am not sure if a similar solution to my separation in content and glue topic maps makes sense there. I do not know the involved technologies well enough.
>
I don't think it applies to Linked Data.

Mostly because there is no guarantee that the links are about the same 
subject or the results of following one are meaningful.

You sort it all out after gathering up the "linked data."

That has been cited as an advantage. The power of *linking.*

Hope you are having a great weekend!

Patrick


> Best,
>
> Robert
>

-- 
Patrick Durusau
patrick-Q/[email protected]
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)

Another Word For It (blog): http://tm.durusau.net
Homepage: http://www.durusau.net
Twitter: patrickDurusau