Possible to escape characters in CSS tags in Sigil?
 

google found for me the possibility of using backslash escape character in CSS, but Sigil v 4.2 is throwing "not well-formed document" error. (on XP SP3 if that affects things)

Specifically, I'm using <h3> tags for chapter headings. I want to enter text in titles that will be picked up by the TOC generator. Some have a double-quote, and Calibre reader TOC cannot parse the unicode curly quotes - it displays black boxes. So I want to use straight quote marks.

Here's an example of what I'm trying to do:
If I use smart / curly quotes around NO, it is fine.
If I try to use straight quotes (alone or with backslash) I get "whitespace expected" error.

Is there such a thing as an escape character in epub tags, or is that wishful thinking?

Use the &quot; entity
 

This should work:

Off topic question: When you say 'picked up', what exactly does the Sigil TOC generator do with the title attribute in a header?

You can also type it like this:

When saving the file Sigil will convert it to the form given by Doitsu in a previous post.

It uses the title attribute for display purposes in the sigil-generated toc.ncx. There are times when the text contained between the 'h' tags may not be exactly what you want to see in the ncx ToC.

That's what I figured but when I first 'figured' it, it didn't make as much sense as your explanation. I can now see that being a bonus. tx

Apologies for very belated thanks!
I knew you guys would have answers for me. I'm using the entity as suggested by Doitsu, working great. Timur, your solution works well for me if quotes are not mixed, but if I have double and single quotes in the text string, can't get it to work out.

Many thanks to all who responded!

Yes, you have to use entity representations, either &quot; or &apos;, if attribute value contains both string delimiter characters.

From Extensible Markup Language (XML) 1.0 (Fifth Edition):