The Page History tool, also known as Article Info, provides detailed statistics about the revision history of a page. Note that if a page has more than 20,000 revisions, only the latest 20,000 revisions are scanned. You can also examine only certain time frames of the page's history by using the "Starting date" and "Ending date" inputs at https://xtools.wmflabs.org/articleinfo.
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The general statistics section contains an overview of the statistics of the page. This includes basic figures like the page size, number of editors, types of editors, number of edits, and various averages.
The "Wikidata ID" field also shows the number of sitelinks, which refers to the number of sister projects that have a page about the same subject.
Beneath the numerical statistics are three charts. The first shows the number of edits made by registered accounts compared to logged out users (IPs). The second chart shows the number of edits that were marked as minor compared to major edits (not marked as minor). The last chart shows the number of edits made by the top 10% of all editors to that page, compared to the bottom 90%. The top editors are ranked by the amount of content they've added to the page.
The Authorship section shows authorship attribution, measured by character count, excluding spaces. There is a dedicated tool showing these same statistics at https://xtools.wmflabs.org/authorship. The statistics are powered by the WikiWho service. For more information, see the documentation on the Authorship tool.
The top editors section shows various information about users and bots who have edited the page. There are two pie charts comparing the top editors by number of edits and by added text. XTools does not count bot accounts as a top editor. Instead, they are listed in the bot list table.
By number of edits
The Top 10 by edits chart compares the number of edits each top editor made. The percentages shown in parentheses refer to the number of edits the user made in relation to total number of edits made to the page.
By added text
Added text refers to any positive addition of content that was not reverted with the next edit. This is because users who fight vandalism (for instance) will otherwise appear to have added a lot of content to a page, when in actuality they just undid an edit that removed a lot of content. Going by edits that weren't reverted, we have a better idea of the users who made meaningful contributions.
Note however that the Page history tool only detects reverts if it happened with the very next edit, and not a later edit.
The "Top 10 by added text" pie chart compares each of the 10 top editors. The percentages shown in parentheses refer to the amount of content that user added compared to all content that was added to the page.
Top editors table
The first table shown lists the top editors (non-bots) and various statistics about their contributions to the page. The last two columns show specialized calculations. Average time between edits (atbe) is the average number of days between each of the user's edits to the page. This is starting with the date of their first edit and the date of their last edit to the page. Added (bytes) refers to the net number of bytes of text the user added to the page.
By default only the first 20 editors are shown. You can expand to show all editors using the link on the bottom row of the table.
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The "Bot list" shows lists all of the bots that edited the page, ranked by edit count. A message is shown indicating if the bot is no longer a bot, and links to the account’s user rights log.
The list is by default limited to the top 10 bots. You can expand to show all bots using the link on the bottom row of the table.
This section breaks down editing activity by each year.
The chart compares the number of edits, IP edits and minor edits over time. The yellow line represents the total size of the article as it changed over time (the right Y-axis denotes the values).
The table lists various statistics for each individual year. Log events show which logged events occurred during that year. The types of events XTools looks for include deletions (e.g. page was deleted then restored), page moves, protections that were applied, and if applicable, stable settings (also known as pending changes protection).
This section breaks down editing activity by each month. There is a small graph shown for each month, which compares the number of total edits made to IP edits and minor edits.
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This lists all the known (semi-)automated tools that were used to edit the page. For more information on how this works, see the documentation on the Auto Edits tool.
Some wikis have a system of rating the quality of a page, known as an "assessment". This section lists any known assessments of the page from each WikiProject, based on PageAssessments data. This section will not be shown if PageAssessments is not installed on the given wiki.
This section lists any issues with the page that were automatically detected. This includes missing basic Wikidata, such as the description, and CheckWiki errors, if applicable to the given wiki. For both, a table is shown explaining each issue and how to fix it. The "priority" indicates how important it is to fix the given issue according to CheckWiki, where 1 is the highest priority. "Notice" indicates where in the wikitext the issue lies.