# Example 53  Cardinalities on expressions
# https://book.validatingrdf.com/bookHtml010.html#sec86

PREFIX :       <http://example.org/>
PREFIX schema: <http://schema.org/>
PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>

:User {
 schema:name xsd:string ;
 ( schema:givenName xsd:string ;
   schema:familyName xsd:string ) ?
}