Why would you need to open the file in Notepad++ ?
1. Because Tools > Code Cleaner ( of CC HTML Editor 12.9 ) dont work with HTML5 tags !
2. Because Notepad++ with complement Tidy2 indent, correct and export in XML ( It's great ! )
Thus, with CC HTML Editor + Notepad++, my files are HTML5 + XML = XTHML5
If my files are XHTML5, then they can be read by programs ( like simplexml_load_file() in PHP )
Recently, I create my micro-blog = many XHTML5 pages + one PHP page (= index.php )
This PHP page lists the titles of my XHTML5 pages and each title is a link to my XHTML5 page
Example on :
http://www.ledru.be/bernard/blog/feminism/index.php?titre
( Actually, you will see only 2 pages, it's not "many", because my blog is recent )
For example of XHTM5 file, look the code of this page
http://www.ledru.be/bernard/blog/feminism/regime.htmCC HTML Editor can make XHTML5 files ? ( and if yes, how to do this ? )
My mother language is French