On 2014-11-07 20:01, Nils Dagsson Moskopp wrote:
Roger Hågensen <resca...@emsai.net> writes:
A link element in the header, maybe call it <link rel="share"
href="http://example.com/article/12345/"; />
or <link rel="share" /> if the current url (or the canonical url link if
present) should be used, although I guess in a way rel="share" will
probably replace the need to use rel="canonical" in the long run.
I do not understand. Why should one invent a rel value (“share”) that
conveys the same semantics as an already existing one (“canonical”) ?
Three reasonings:
1. HTTP (301) redirects are advised over rel=canonical, Matt Cutts at
Google has posted about that in the past as far as I recall. And it
makes sense as the bots don't need to parse the page to get the
canonical url.
2. Bookmarking should be of the current page the user has displayed, if
they bookmark the page and a different url is bookmarked I'd consider
that undesired behaviour (in the eyes of the user) unless a UI informs
them or gives them an option.
3. rel=share has already has been "invented" though I'd hardly call 5
letters an invention.
rel=share also shows clear intent.
A bookmark may be user specific or private to that user.
A canonical (or HTTP 301) indicate to the browser or bot that the page
is "over there" and not here.
A share is intended to to be, well shared.
It semantically makes sense, at least to me.
rel=bookmark and rel=canonical and a rel=share are all hints.
A search engine for exasmple if it sees a rel=share link that is
different from say the canonical url (either via HTTP 301 or current
page or rel=)canonical) should probably ignore it as such a share link
may have a share tracking url with a reference ID in it.
Also, rel=share is in the wild, I had a url to a list of rel=
occurrences on the web but ironically I did not bookmark i/note it down.
While it was low on the list, it was there.
Anyway, this is one place where the rel=share idea is mentioned.
https://wiki.mozilla.org/Mobile/Archive/Sharing
There is also a rel="share-information" floating around out there, but
the search engines aren't making it easy for me to search this stuff
(I'm probably using the wrong syntax/markup). But I found it referenced
here https://code.google.com/p/huddle-apis/wiki/AuditTrail
There is a rel=share example use on page 5 of
https://tools.ietf.org/id/draft-jones-appsawg-webfinger-00.txt
Used exactly as how I described it.
Here is a example of rel="share-link" being used
https://github.com/engineyard/chat/blob/master/views/index.jade
And rel="share" is used in an example here
https://code.google.com/p/huddle-apis/wiki/Folder#Response
And stated specifically here
https://code.google.com/p/huddle-apis/wiki/Folder#Sharing_a_folder
As I see it there share is not the same as bookmark or canonical.
There may be some overlap with rel=share and a normal link though (if
rel=share is used outside the html head).
--
Roger "Rescator" Hågensen.
Freelancer - http://www.EmSai.net/
