Are inline on* event attributes deprecated in HTML5?
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* Also, given that the <html></html> tags are now implied and needn't be specified, is there any way to specify a document language without using those tags?

* Is it possible to read a file with the FileReader API that your user DnD'd, then have the user open said file in, say, notepad, modify + save the file, and then for you to read the new changes without the user having to re-DnD the file again?