Source:http://linkedlifedata.com/resource/umls/id/C0028811
MSH: Crafts, trades, professions, or other means of earning a living.,CSP: crafts, trades, professions, or other means of earning a living.,NCI: A code specifying the job performed by the employee for the employer. For example, accountant, programmer analyst, patient care associate, staff nurse, etc.,NCI: The principal activity that a person does to earn money.