> if i miss FrameworkExtraBundle, simply nothing will happen and my tags not seen, right?

Right.

> what if i have the bundle, but use symfony 2.3 and did not require expression language separately?

You could use the static tags: `@Tag("static")`. Then with expression language installed you also have the dynamic tags: `@Tag(expression="'dynamic'~post.getId()")`. As you can see, I differentiated between the two cases by adding an `expression` property on the annotation.