Hi, I am new to MAC development. I am developing an application on MAC OS 10.4 version, where we are using NSXML for XML related functionalities. Now as I also have to include support for MAC OS 10.3, I found two options in front of me: 1. Use libXML, which will work for all the version 10.3 and later or 2. Use Core foundation XML API Please let me know which option is advisable and why. Any help would be appreciated. Thanks.