How should I use canonical tags when I have multiple variables?

[buguela]

Hello,
I want to know if someone can help me about a correct usage of canonical tags when you have multiple parameters.

Example:

www.site.com/page.php?foo=1&bar=2

Should I use & or & into rel attribute?

1) <link rel="canonical" href="http://www.site.com/page.php?foo=1&bar=2"/>

2) <link rel="canonical" href="http://www.site.com/page.php?foo=1&amp;bar=2"/>

Which is the correct one?

[buguela]

Pedro Dias, from Google Ireland, told me into Portuguese Webmasters Group that we should use as we use into URL address bar... so, we should use version one.

[google.com...]

[tedster]

Thanks for both the question and the answer. I ran the Portuguese through Google Translate, and indeed, this is what it says:

The links must be placed in the same way that you would put in the address bar of your browser.

That makes sense to me.

[phranque]

except that it won't validate:

Warning: unescaped & or unknown entity "&foo"