Trying out PECL's SCA_SDO package

In order to start offering Web Services inside Dokeos, I (and Stefaan Vanbillemont) have been testing out the SCA_SDO package from PECL (for PHP), that reportedly offers the possibility to deploy web services from existing functions only by including a common file and adding a bit of documentation "PHPDocumentor style" to the code. As we are using PHPDocumentor-like comments already, and have a lot of existing functions possibly offering all the services we would like to offer as web services, I thought SCA_SDO was a perfect match. The SDO-part of the extension will not be used in our contex