Re: [Demexp-dev] Question about tags, tags updating and timestamp.

[David MENTRE]

Hi Augustin,

Augustin <address@hidden> writes:

> If tag_id 123 = "Question 456",
> is it possible that the same tag_id 123 will be updated later so that
> tag_id 123 = "economy"?

No. Tags with pattern "Question xxx" are reserved for classification
system. They won't change.

> If tag_id 222 = "Question 444".
> The question 444 will obviously be tagged with tag_id 222.
> Is it possible that other related questions get tagged with the same tag?
> i.e. question 445, 446 and 447 all have the tag_id 222 = "Question 444"?

In fact, I don't know. Initially, tags "Question xxx" where for the
classification system. But (i) I don't know if classification system is
going to use it and (ii) tagging another question with tag "Question
444" to express a link with question 444 had been used in the past.

So it might be possible.

> Each tag_id has their own timestamp.
> When is each tag timestamp updated?

When the tag is modified (i.e. its label).

> Only when the label of the tag changes, i.e when tag_id 55 = "economy" is 
> changed to tag_id 55 = "aab: economy"?

Yes.

> Is the timestamp updated under other circumstances?

No.


As a general rule, the timestamp is increased each time the
corresponding element (question, tag, etc.) has been modified. All
dependent elements (e.g. a question using that tag) should be updated
with the new element. Yes, I know this definition is rather vague. ;-)

Best wishes,
d.
-- 
GPG/PGP key: A3AD7A2A David MENTRE <address@hidden>
 5996 CC46 4612 9CA4 3562  D7AC 6C67 9E96 A3AD 7A2A