has address number
Optional, additional structured version of an external house number, or range of numbers, contained in one of the address line elements. This could be a numeral, a letter or code made up of mixed characters (e.g. 221B).
An element of this type has minimum length of one character and may not contain any of: the carriage return (#xD), line feed (#xA) nor tab (#x9) characters, shall not begin or end with a space (#x20) character, or a sequence of two or more adjacent space characters.
restriction of xs:string
pattern \\S+( \\S+)*