Add requirements for route with annotations

I am using the SensioFrameworkExtraBundle and trying to add a requirement for a specific parameter. I want the parameter to match a specific collection of strings. This example from the Symfony documentation shows what I want to do. I want to do the same thing as done with culture and _format. ``` article_show: path: /articles/{culture}/{year}/{title}.{_format} defaults: { _controller: AcmeDemoBundle:Article:show, _format: html } requirements: culture: en|fr _format: html|rss year: \d+ ``` This is my code: ``` /** * @Route("/{type}", requirements={"type" = {html|json|xml} }, name="adm_grid") * @Template */ ```