To include comments in an HTML document, use a comment declaration. A comment declaration consists of `<!' followed by zero or more comments followed by `>'. Each comment starts with `--' and includes all text up to and including the next occurrence of `--'. In a comment declaration, white space is allowed after each comment, but not before the first comment. The entire comment declaration is ignored.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <HEAD> <TITLE>HTML Comment Example</TITLE> <!-- Id: html-sgml.sgm,v 1.5 1995/05/26 21:29:50 connolly Exp --> <!-- another -- -- comment --> <!> </HEAD> <BODY> <p> <!- not a comment, just regular old data characters ->