Attributes are also sometimes called properties. -- VictorPorton Values of several attributes can be automatically kept equal (or otherwise corresponding) to each other using BindingProperties patterns. -- VictorPorton ---- ''This appears to be jargon for a particular software package, rather than terms common throughout ComputerScience. Perhaps the software package can be identified on the top? Also, remember that WikiIsNotaDictionary.'' A bit of googling makes it appear that this is a Mozilla XBL thing: XBL (Extensible Binding Language) 1.0, bindings attached to elements in other documents via CSS or DOM. http://www.mozilla.org/projects/xbl/xbl.html http://docs.mandragor.org/files/Misc/Mozilla_applications_en/mozilla-chp-7-sect-3.html