As far as I know, it means that by default any text being displayed on a html page is automatically html quoted. So when you have a 'less than' sign in your tcl string, it will automatically be converted into the appropriate html entitiy in the adp page. This default quoting can be explicitely switched off for individual strings if required. 'noquote' is a bit of a misnomer, it should propably be 'quotebydefault' or something like that.