version

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Revision as of 21:11, 1 April 2013 by Tantek (talk | contribs) (comments on version, revision, current, latest)
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<entry-title>version</entry-title>

Per the microformats The microformats process, this is a page for researching and brainstorming a rel value for linking to a previous version of a page.

use case

To be able to discover previous versions of a document automatically from a document.

examples

  • W3C. Nearly every W3C specification has a link in the header to the "Previous Version".
  • ...

formats

revision control systems

Revision control systems (RCS) like:

  • CVS
  • SVN
  • mercurial (hg)
  • git

All have ways of representing previous versions of a document.

brainstorming

Several rel values are being considered for linking from a document to a previous version of that document.

  • rel=older
    • -1 Tantek: "older" feels wrong as a noun.
  • rel=version
    • +1 Tantek : this feels like the most human-author-friendly term of these.
  • rel=revision
    • Mediawiki uses the term "revision" in the UI when you're viewing a previous version of a page.
    • "revision" has a developer feel to it, common terminology in revision control systems (naturally) like git etc.
  • ...

related brainstorming

A related use case is to be able to find the current version of document when looking at an older version. For this, the following rel values are being considered:

  • rel=current
    • seems like a link to something that is always current, not that it happens to be current right now. - Tantek
  • rel=latest
    • might mean a specific link to the latest version, though W3C specs use the phrase "Latest Version" to label the link to the always current URL - Tantek
  • ...

related work

You can already use:

  • rel-canonical to link to the canonical version of a page. But this doesn't mean it's a different version, if anything, it may be the exact same content just at a shorter or more reliable/official URL.

see also