What is “HTML” and “HTML-Embedded” in Special Syntax combo box on the Highlight (2) tab of Properties?

HTML is used when HTML tags specifying the script language (for example SCRIPT type=...) exist in the HTML document. HTML is also appropriate for ASP files that include scripts beginning with the % mark. This is usually the case for VBScript, Javascript, PerlScript, CSS, etc. HTML-Embedded is appropriate when working with script languages such as PHP or JSP and the characters that normally mark the beginning of scripts in such languages, which are specified in the Script Begin box.