When it is necessary to identify a person by two professions or fields of activity in a qualifier, are these terms entered into a single $c or in separate subfields?
For example, there is this name authority record by LC, where the two :
040 DLC ǂb eng ǂe rda ǂc DLC
100 1_ Wang, Wei ǂc (Law teacher) ǂc (Writer on industrial laws and legislation)
Are there separate $c subfields because "Law teacher" is technically an occupation and "Writer on ..." is a field of activity?
There are a lot of existing authority records where the professions/occupations/etc. are enclosed in a single subfield, such as:
100 1_ Smith, Simon ǂc (Teacher and poet)
The MARC authority format allows for repeated $c subfields, but the example given shows different types of usage (different types of titles and other terms):
0_ $a Black Foot, $c Chief, $d d. 1877 $c (Spirit)
I cannot find instructions guiding us to a preferred method. I do not see an example in RDA (and LC-PCC PS) 18.104.22.168. Should the Smith example above be?
100 1_ Smith, Simon ǂc (Teacher) ǂc (Poet)