From: "Thomas Olsen" <thomas@iconmedialab.dk> > <p tal:condition="exists:request/arg"> > Show this if arg exists > </p> This *should* work, but doesn't, due to an over-hasty release on my part. You can use "(exists) request/arg" with the current version, though "exists:" will be re-enabled in the next release. Cheers, Evan @ digicool