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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9806) Add a canonical link element to documentation HTML
Date Mon, 23 Jul 2018 15:30:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553000#comment-16553000

ASF GitHub Bot commented on FLINK-9806:

GitHub user patricklucas opened a pull request:


    [FLINK-9806][docs] Add canonical link element to docs

    ## What is the purpose of the change
    Flink's documentation's SEO is a mess, with web searches often returning results from
many Flink versions, usually with the latest not at the top.
    This change adds an HTML `link` tag with `rel="canonical"` to indicate to crawlers where
to find the latest version of the page, i.e. served from `//ci.apache.org/projects/flink/flink-docs-stable/`.
    ## Brief change log
    - Update Docker image for building the docs to support the required ruby version
    - Add value to the docs config file to indicate the "stable" base URL
    - Add a `link` element with `rel="canonical"` to the base template so each page includes
it with the appropriate value
    ## Notes
    Once this has been merged, we should port this change to the release branches whose docs
are still available.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/patricklucas/flink FLINK-9806_docs_canonical_url

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #6396
commit 2fec8ceafcb02d2024ab269c775418311661c9a3
Author: Patrick Lucas <me@...>
Date:   2018-07-23T14:24:08Z

    Use fedora for Docker docs build for newer Ruby
    The docs require Ruby >= 2.1.0 which isn't shipped by CentOS 7. It is
    available in Fedora 28, however, and I don't see any harm in switching
    to it.

commit ff42e8a65ce0304ce194d3761aad446d16667eee
Author: Patrick Lucas <me@...>
Date:   2018-07-23T15:17:14Z

    Add rel=canonical link to all pages


> Add a canonical link element to documentation HTML
> --------------------------------------------------
>                 Key: FLINK-9806
>                 URL: https://issues.apache.org/jira/browse/FLINK-9806
>             Project: Flink
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 1.5.0
>            Reporter: Patrick Lucas
>            Priority: Major
>              Labels: pull-request-available
> Flink has suffered for a while with non-optimal SEO for its documentation, meaning a
web search for a topic covered in the documentation often produces results for many versions
of Flink, even preferring older versions since those pages have been around for longer.
> Using a canonical link element (see references) may alleviate this by informing search
engines about where to find the latest documentation (i.e. pages hosted under [https://ci.apache.org/projects/flink/flink-docs-master/).]
> I think this is at least worth experimenting with, and if it doesn't cause problems,
even backporting it to the older release branches to eventually clean up the Flink docs' SEO
andĀ converge on advertising only the latest docs (unless a specific version is specified).
> References:
>  * [https://moz.com/learn/seo/canonicalization]
>  * [https://yoast.com/rel-canonical/]
>  * [https://support.google.com/webmasters/answer/139066?hl=en]
>  * [https://en.wikipedia.org/wiki/Canonical_link_element]

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