Quote:
Originally Posted by Jim Chapman
Reality check: using <p> </p> to represent a section break is 'valid' in the limited sense that the XHTML standard says that it is acceptable XHTML. But because the XHTML standard is not explicit about how you should display non-rendering non-whitespace, it does not tell us what a reading system has to do with that valid coding. It would be acceptable to ignore it (on the grounds that it is a P element containing no renderable content). It would also be acceptable to add a line containing nothing (on the grounds that it is a P element containing non-whitespace characters).
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I can you an example of a reading application that does ignore "<p> </p>": Mobipocket Reader. A rather elderly program, to be sure, but nonetheless it will completely ignore that code and not display any vertical space for it at all.