Don't use xerces_3_1 namespace explicitly
That prevented from building the SDK with other version of libxerces than 3.1, which may happen while building Flexisip since it uses the libxerces provided by the system.
Edited by François Grisez
That prevented from building the SDK with other version of libxerces than 3.1, which may happen while building Flexisip since it uses the libxerces provided by the system.