Parametric attributes in a requirement - DOORS NG

I am pretty certain the answer is Yes and there is a good video on YouTube on how to do this very thing, unfortunately I'm not finding the link.

In this case the parameter becomes just another artifact that you can embed in an existing artifact. Once embedded you can decide how it looks, in terms of whether or not you see the artifact ID/name or the actual value (the thing you want)

In DNG you can define any type of artifacts and with each decide which attributes go along so you can easily create a parameter artifact which has no attributes.

In addition to Alex's suggestion, Big Lever Gears and pure-systems pure::variants are feature modeling tools which make it possible to define and apply parametric values to requirements and other development artifacts, as well as other value-adds.