I would just consider it a tip about a possible portability problem in your document.
If you're aware if it and you don't consider it a real problem, you can ignore the error.
I'm not sure the HTML5 spec states a requirement on Unicode Normalization Form C,
Thank you. I do not know what is a portability problem but I think that your answer is that I can ignore it with no problems of the publication of the ebook. Is it trueY
You need to test that it displays on the platforms of your user demographic.
IMHO, If no problems, you can ignore it.
After searching what was "demographic IMHO"..... I will try. Thanks
My apologies for speaking in shorthand, IMHO means "in my humble opinion".
Your hosting company should provide statistics on the kinds of devices your visitors are using to view your content.
If you care to post a link to a sample of your online content, we can let you know whether it functions on our various desktop, Ipads and handheld devices for you.
e-Books are typically viewed in an e-Book reader like Amazon Kindle, Nook, Sony Reader, Kobo Glo, etc... These devices don't behave like regular web browsers. So be sure to test your product in the devices you plan to support.