Rendering software should be quite tolerant regarding validity, processing tools should not be required to be overly tolerant to all kinds of non-standard data junk, and creation tools should absolutely follow a zero tolerance policy. The fact that underlining is bad typography is a separate issue besides technical correctness. Syntactical and semantical correctness are the bare minimum for 21st century web and e-book technology.
Last edited by skreutzer; 04-17-2014 at 04:53 PM.
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