The field ‘Role’ has been renamed ‘Discipline’ in the most recent edition of BS EN ISO-2 19650-2:2018 NA February 2021.
The previously used role codes, derived from BS 1192:2007, had conflicts associated with contractual statuses such as client, contractor, and subcontractor, or sometimes inappropriate use of occupation title such as architect. 
As a result, the list of standard codes has been revised with the goal of aligning disciplines with project activities; a comparison of changes is shown in Table 1.
|code||BS EN ISO 19650-2 2018||BS EN ISO 19650-2 2018, NA 02/2021|
|B||building surveyor||building surveying|
|C||civil engineer||civil engineering|
|D||drainage, highways engineer||demolition/dismantling|
|E||electrical engineer||electrical engineering|
|F||facilities manager||facilities/asset management|
|G||geographical and land surveyor||ground engineering|
|H||heating and ventilation designer (deprecated)||highways and transport engineering|
|I||interior designer||Not used|
|L||landscape architect||landscape architecture|
|M||mechanical engineer||mechanical engineering|
|O||Not used||other discipline|
|P||public health engineer||public health engineering|
|Q||quantity surveyor||quantity surveying/cost consultancy|
|R||Not used||project management|
|S||structural engineer||structural engineering|
|T||town and country planner||town and country planning and building control|
|X||subcontractor||non-discipline specific or not applicable|
|Y||specialist designer||topographical surveying|
|Z||general (non-disciplinary)||multiple disciplines|
 Boutle, A., Dodd, P., Dearlowe, J., Hooper, E., Ford, J., Rossiter, D., Tennyson, R., Thompson, N., Winfield, M., Zahiroddiny, S., 2021a. Guidance Part 2 Parties, teams and processes for the delivery phase of assets, 6th ed, UK BIM Framework. UK BIM Alliance.