XML form "News": validity of entries

Hi all,

how can I get kind of a validity function into e.g. the News project in the XML Form Builder?

We are using EP 6.0 and it would be great to create a new topic in the news area together with a "lifetime" that has the effect that the topic vanishes after the given date! Or to take another perspective: How is it possible to show only the topics which have a validity date that is greater or equal to today?

Has anybody an idea? Any help would be great.

Best regards,

Bernd Neukamp