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Subject: cos01 comment - default value for order
Editorial comment: There is no default for the value of the order attribute. Without a default, implementers are left to guess how the value-less elements should be handled if other elements have a value. The most logical answer is that when the order attribute is not defined, its implied value is the same as the index value of the <ignorable>/<segment> element: For example, if the <target> of the second <segment> (or a unit with only <segment> elements) has no order defined, its implied value is 2, etc. While it is a bit obvious, I think it would be clearer to make it explicit in the definition of value so the implementers don't have to guess. So I would propose to replace: [[ Default value: undefined ]] By something like: [[ Default value: the 1-based index value of the element where the <target> holding the order attribute is defined. For example, if the order attribute of the <target> of the second <segment> elements of a <unit> made only of <segment> elements is not specified, its implied value is 2. ]] Or maybe someone can come up with a better wording. Regards, -yves
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