Lesson plan

XFixes

In computing, XFixes is an X Window System extension which makes useful additions to the X11 protocol. It was started in 2003 by Keith Packard. It first appeared in the KDrive X server and later in X.Org Server version 6.8.0. The extension implements a collection of unrelated additions to the protocol. The theme of the collection is small additions to remove important defects in the protocol that can't be worked around using the pure X11 protocol. The point of implementing these additions in an extension is to leave the core server code, and a server that does not include the XFixes extension, implementing the original pure X11 protocol. However, as the additions are designed in a backward compatible way, there is no practical reason for a server not to implement them. The client and server can always negotiate down to the additions that both understand.

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Article summary

In computing, XFixes is an X Window System extension which makes useful additions to the X11 protocol. It was started in 2003 by Keith Packard. It first appeared in the KDrive X server and later in X.Org Server version 6.8.0. The extension implements a collection of unrelated additions to the protocol. The theme of the collection is small additions to remove important defects in the protocol that can't be worked around using the pure X11 protocol. The point of implementing these additions in an extension is to leave the core server code, and a server that does not include the XFixes extension, implementing the original pure X11 protocol. However, as the additions are designed in a backward compatible way, there is no practical reason for a server not to implement them. The client and server can always negotiate down to the additions that both understand.

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Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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Key claims and bibliography are generated from the same tracked claims and sources as the article page.