Oberon/Comparing Versions and Pages
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< Oberon
Oberon has module Diff. Two pages or Texts can be retrieved to files TextFile1 and TextFile2. MM on Diff.Do TextFile1 TextFile2 will produce a side by side comparison.
To compare versions of a page within the book, open the history using the button at the top of the page. Choose two versions and "Compare selected versions".
To compare any two pages using the MediaWiki facility, ID numbers are specified in a URL. In the page history of ETH_Oberon/2.3.7/HTML.Mod, when the mouse pointer is hovered over the date in the entry for the original version, ID 3495065 is reported by the browser. A more recent version is 4068966. The URL
https://en.wikibooks.org/wiki/?oldid=3495065&diff=4068966&diffonly=1
produces a side by side comparison.