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The revision history, also called page history or edit history, of all pages is available. It consists of the old versions of the wikitext, and also a record of the date and time of every edit, the user who made it, the edit summary, and a possible marking as "minor edit". For the radio buttons on the left see Help:Diff.

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Psychology: Debates · Journals · Psychologists


Page history

Every page has a link "Page history" to the list of edits. Also the Recent changes and Related changes pages have links to the histories of listed pages.

An exception are pages which have been deleted (not to be confused with pages that have been blanked), for which the only record available to non-administrators is the deletion log and possibly the "votes for deletion" archive. Edits to them are not even in the User Contributions pages. However, the revision history is kept and can be retrieved by a sysop, who can also undelete the page (see w:Wikipedia:Viewing and restoring deleted pages by sysops).

The policy of keeping the page history did not exist in the beginning of Wikipedia's existence, so the page history of that time is lost.

Every line represents one edit to the given page and the version resulting from it

  • "last" is similar to "diff", explained in Recent changes
  • "cur" gives the difference between this version and the one at the time of loading the history page (i.e., excluding the edit shown by pressing the "last" next to it), which is the cumulation of all later edits, except those which are not in this revision history because they were made after loading this page
  • the date and time link to the version of that day and time, using a URL with oldid=revisionid.

The "cur" and "last" features should be similar to those in Enhanced Recent Changes, but there is a bug in the latter.

For every version there is a box on the line. Marking two boxes gives the difference between the two versions. The box at the top corresponds to the latest edit, which is not necessarily the edit about which the info on the line is (another edit may have been made after loading the page history),

If the "move page" feature has been used in the past to change the name to the current one, the entire edit history of the article, before and after the move, is shown, but the move itself is not. The move itself is shown in the edit history of the page with the old title, which automatically has become a redirect page.

After merging two pages, typically one becomes a redirect. In that case, this redirect has a real edit history.


See also: w:Wikipedia:Usemod article histories.

Reverting a page

If your new pages edits aren't to your liking, don't panic, you can 'revert' the page to any previous version using this technique -> [1]

Providing for a separate edit history for a section

Without changing the appearance of a page, a section of it can be an included separate page, see composite pages. This way a separate edit history is provided for the section. Also this allows watching it separately.

Permalink; history of the wikitext vs. history of the rendered page

It is occasionally useful to link to a specific version of an article (a snapshot of it). For example, one might have done a review of a Wikipedia article and want to indicate which particular version was reviewed.

If the version is not the current version, one can use the page history to view the old version of the page. The URL of this old version is suitable for use to permanently reference this version, and can usually be obtained from the browser's location bar.

If the version is the current version, for technical reasons it is impossible to link to that specific version. The best solution is to make some change to the page (ideally an improvement, but a change that has no effect on the rendered form of the page is probably easier) so that the version of interest is no longer current, then follow the instructions above. Template:H:new

See also URLs of old versions of pages.

The history of the wikitext should not be confused with the history of the rendered page:

  • If a page contains a variable depending on time, its rendered content varies with time; for example, {{CURRENTTIME}} gives the time of viewing the page; if at some stage the tag {{subst:CURRENTTIME}} has been placed, it has been replaced in the wikitext by the time of saving that revision; there is no variable for the time of saving the particular revision.
    • In particular, templates and images will vary if they are referred to with an expression containing a variable depending on time
  • The current versions of templates and images are used (see also bugzilla:851); it is not possible to specify a particular revision, unless old versions are given different names, so that, for the system, they are current versions; note that also templates used within these templates may have been revised.

For a true permalink, upload the rendered page as HTML file (if enabled by the system) and link to the URL, e.g. http://upload.wikimedia.org/wikipedia/en/d/d1/Wikitest.html (see also the image page w:en:Image:Wikitest.html; by the way, this page was not uploaded because of templates or images, but because of added functionality using Javascript, not allowed in wikitext).

The HTML contains the contents of the templates, so the page is not affected by a change or deletion of a template. It further contains URL-references to images; it is not affected by an image revision, but it is by a deletion.

To produce a wikitext version not depending on templates use "subst:", if necessary recursively.

See also Help:Downloading pages.

Special:Export

Special:Export produces an XML-file, without the MediaWiki user interface, with the wikitext of the current and optionally all old versions of one or more specified pages, with date, time, user name, and edit summary. How it is displayed, e.g. with or without XML tags, and with or without applying newlines, depends on the browser. Some browsers show "+" and "-" links to view or hide selected parts. Alternatively the XML-source can be viewed using the "view source" feature of the browser, or after saving the XML file locally, with a program of choice.

The feature also allows searching for a text in all versions of one or more specified pages. See also XML export.

Image history

An "image" (in the broad sense of an uploaded file) can be edited, or, more generally, be replaced by a different image, by uploading a new image file with the same name. Again all versions are kept. The image history listing forms part of the image description page, which appears when clicking on the image. The image history consists of this and the old versions themselves.

The image description page consists of three parts:

  • description of the image
  • "Image history" - similar to a page history, with for each version an upload summary and also the file size.
  • "Image links"

The description part has also an edit history; it is labelled, somewhat confusingly, Image:xxx Revision history. It should not be confused with the Image history.

Not kept are images which have been deleted (not to be confused with images that are no longer used in articles), the only record available is the upload log, deletion log and possibly the "votes for deletion" archive. Neither the latest nor older versions are kept by the system, hence it is not possible to undelete an image.

Archiving

Archiving texts in separate pages is superior to using the page history as archive: texts in archive pages can be found searching with Google and using the search feature of Wikipedia. Page histories can only be searched after applying Special:Export. Also, archive pages can be organized and titled afterwards in a suitable way, while e.g. edit summaries can not be supplied afterwards. However, an index of old versions of a page, with links to them, could be prepared.


edit

Wikipedia-specific help

Template:Ph:Page history


This page is a copy of the master help page at Meta (for general help information all Wikimedia projects can use), with two Wikipedia-specific templates inserted. To update the main text, edit the master help page for all projects at m:Help:Page history. For Wikipedia-specific issues, use Template:Ph:Page history (the extra text at the bottom of this page) or Template:Phh:Page history for a Wikipedia-specific lead (text appears at the top of this page). You are welcome to copy the exact wikitext from the master page at Meta and paste it into this page at any time. To view this page in other languages see the master page at Meta.

History

You can access the history of a page by clicking "History" from the edit button dropdown

Each editable page on Wikia has an associated page history, which consists of the old versions of the page text, as well as a record of the date and time of every edit, the username or IP address of the user who wrote it, and their edit summary.

You can access a page's history via the 'Edit' button's dropdown menu. It can also be viewed via a link in toolbar when visiting a page.

Quick overview:

  • The newest changes are shown at the top
  • To view a specific version, click a date
  • To compare an old version with the current version, click cur
  • To compare a version with its predecessor, click last
  • To compare to specific versions, select the left-column radio button of the older version and the right-column radio button of the newer version, and then click "Compare selected versions"
  • Minor edits are denoted as m
  • Edits by bots are denoted as b

Step by step

Below is an example of a page history:

Screenshot page history

Page history, with labels

Edits are shown from newest to oldest. Each edit starts on a new line and shows the time and date, contributor's name or IP, edit summary, and other related information for the edit.

Let's look at some of the features of this page:

  1. The page name.
  2. (cur) takes you to a 'diff' page - any page showing the wikitext difference between that edit and another version of the page history. In this case the diff page is comparing the selected version and the current version. The current revision appears below the changes, so you can see how the page is now rendered.
  3. (prev) takes you to a diff page showing the changes between that edit and the previous version. The most recent version (the one on the same line as the "last" you clicked on) appears below the changes, so you can see how the page was rendered.
  4. The two columns of radio buttons can be used to select any two versions on the page for comparison. The most recent version is shown below the comparison.
  5. The time and date of the edit, expressed in the local time according to user preference setting, which links to that specific revision.
  6. The username or IP of the contributor appears here.
  7. This is the edit summary - the text the user wrote in the editor's edit summary box.
    • Some of these begin with an arrow link and grey text. This means the user has edited a specific section of the page (named in the grey text). This text is automatically added when you edit a section. A standard edit summary can still be added by the user, which appears in black text.

If a page has been renamed in the past, the entire edit history of the article, before and after the move, is shown. The old title becomes a redirect and loses its edit history.

Edits made to deleted pages are not kept in contributor's User contribution pages. However, the revision history is kept and can be retrieved by an administrator, who can also undelete the page.

Going deeper

Creating feeds

Feeds (RSS and Atom) for the history of a page are available - you can use a feed aggregator or other tool to monitor changes to the page.

The RSS2Wiki extension will allow you to include the RSS feed into another wiki page.

Linking to a specific version of the page

If you want to link to a specific revision of a page, click on the related date for the version on the page history. The resulting URL is suitable for use as a permanent reference to this version.

Note:

  • If a page contains any time-based variables, its rendered content will use the current date/time, not the time as it was when the revision was saved.
  • The latest versions of templates and images are used; if they have been revised, the page may look different than it was at the time the version was saved.

Exporting page history

You can export a page's history using the export tool.

Image history

An image or other media file can be replaced by a different image, by uploading a new image file with the same name. All versions are kept. The image history listing forms part of the image description page, which appears when you click on the image. From here, the image history can be viewed, and older versions can be deleted or restored.

See also

Further help and feedback

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