IUT 2009 MediaWiki Workshop/Activities/Collaborative Editing/Diff and History

History

All editable pages on WikiEducator have an associated page history, which lists all changes made to the page in reverse-chronological order. You can access this information by clicking on the history tab that is located at the top of every page. Viewing the history of a page is similar to looking at the Recent Changes, but in this case the changes are just for this page.

Diffs



The history page also allows you to compare changes between one edit of the page and others. A diff is the difference between two versions. It can be viewed by clicking the page history tab at the top of every page. For every version or change that has been made to the page there are potentially two radio buttons: the left column is for selecting the older version, the right column for selecting the newer one. Pressing "Compare selected versions" gives the difference between the two versions.



If you have completed the above Activity you would have noticed a screen that looked similar to this:



The right hand side displays the most current version of the page, while the left shows the previous state. From this diff we can see that the user (Mackiwg) changed Line 50 from 46 Weeks to 50 Weeks and also added a note about how the project duration was estimated.

Viewing the diff between two versions of a page is the best way to get a detailed view of what exactly has been changed on a page.