Asset location: can field be "list" instead of "free text"?

We are evaluating SD+ as our helpdesk system. We have a strong policy on correctly manage item's position inside the company and it looks like in SD+ the location field used in the asset/workstation form is a free text field, which means that we cannot guarantee the authorized location standard is used when moving IT object inside the company (every room/location has a specific code).
I kown SD+ can used additional fields and that one one them could be used to contain that specific information, but the additional fields are "added" to the core information of the asset instead of being part of what should be that basic info of the asset itself: this is clearly visible even form an UI point of view.
Is there a way to change the format of the original "location" field from free text to a list of values to choose from ?
Thanks in advance.