Assertion: nurse's certification | /r/HasProperty | voluntary
Facets:
value: usually
type: DEGREE
Source sentences:
text: Although certification is usually voluntary, it demonstrates adherence to a specific level of competency, and some employers require it.
text: Nurses interested in specializing in cardiology may apply for voluntary certification with the American Nurses Credentialing Center or the American Board of Cardiovascular Medicine.
text: Certification in this field is voluntary.
text: Although certification is usually voluntary, it demonstrates adherence to a higher standard, and some employers require it.