MatchesXsNonNegativeInteger🔗
          Check that 
        
        
      text conforms to the pattern of an xs:nonNegativeInteger.
        Code
nonNegativeIntegerRep = (
    '(-0|\\+?[0-9]+)'
)
pattern = (
    f'^{nonNegativeIntegerRep}$'
)
return match(
    pattern,
    text
) is not None