gistfile1.txt

{
    name:           %w(employee lastnamefirstname displayname),
    employee_id:    ['employeeid'],
    email:          %w(emailwork workemail),
    date_of_birth:  %w(dob dateofbirth birthdate),
    start_date:     %w(startdate hiredate),
    end_date:       %w(enddate terminationdate),
    locale:         ['language'],
  }.each_with_object({}) { |(k, v), h| v.map { |f| h[f] = k } }