[css-d] How do you determine the CSS version ?

Hi, I have a basic question: how do you determine which CSS version it is when it is not specified neither in the CSS files and the HTML headers ? I have several CSS files, it would be nice to tell if it is CSS1 or CSS2. Thanks ! - How low will

Re: [css-d] How do you determine the CSS version ?

I thought css1 was a subset of css2.0, and that css2.1 was a slight modification of css2.0, and in fact a replacement for css2.0 Is it more complicated that that? Isn't it true that the browsers have only a single CSS 'engine'? and that they vary their process only depending upon the html dtd