Validation
I'm new to conversion and am trying to convert my books into Epub. Am using Calibre to do the job, thought I was doing fine as the result seemed legible to me, ran a Validation check using the facility in Sigil, and found a host of problems. May of them read "attribute 'clear' is not declared for element 'br'", some read "hspace" instead of "Clear", one reads "value 'Picture 2' is invalid NCName" and one "The <language> element is missing.". I have absolutely no idea what any of that means. Can anyone tell me if it's fixable, or should I give up and pay someone like Lulu to do it?
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