Solution to Representing IP addresses in XML Schema

Roger L. Costello costello at
Wed Dec 22 12:33:34 GMT 1999

Hi Folks,

Below is the solution to creating an XML Schema datatype to represent IP
numbers.  Thanks to all those who responded, especially Robert Hanson
who came up with the solution.  /Roger

<datatype name="IP" source="string">
   <pattern value="((1?[0-9]?[0-9]|2[0-4][0-9]|25[0-5]).){3}
             Datatype for representing IP addresses.  Examples,
      ,, etc.
             This datatype restricts each field of the IP address
             to have a value between zero and 255, i.e.,
             Note: in the value attribute (above) the regular
             expression has been split over two lines.  This is
             for readability purposes only.  In practive the R.E.
             would all be on one line.

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