a "resource Code " for a role

Hi Folks,

I have an interesting questionf for you. I probably know the answer although am looking for a potential work arround.

Here is the capability we would like :

We are in our demand planning for a specific project and we are identifying  roles without names. Is there a way to plan a role with a resource code specifying the specialisation within the demand ?

For example : We are planning an electrical engineering specialist as a role and would like to add the specialisation of Designer. We are trying to keept the roles to a minimum to avoid complicating our planning process.