public PartRule()
{
var prefixes = new[] {
"pt",
"part"
};
RB = new ReBulk(name: "part").Options(RegexOptions.IgnoreCase)
.Regex(RegexUtils.BuildOrPattern(prefixes, "prefixes") + @"-?(?<part>" + RegexUtils.BuildOrPattern(new[] { Regexes.digital_numeral, Regexes.roman_numeral }, "partnumber") + @")")
.Then(x => IsNumeric(x));
}