MatchesXsNegativeInteger🔗
          Check that 
        
        
      text conforms to the pattern of an xs:negativeInteger.
        Code
negativeIntegerRep = (
    '(-0*[1-9][0-9]*)'
)
pattern = (
    f'^{negativeIntegerRep}$'
)
return match(
    pattern,
    text
) is not None