— Mobile learning applications introduce a new degree of ubiquitousness in the learning process. There is a new generation of ICT-powered mobile learning experiences that exist in isolated contexts: experiences limited to small learning communities. These rising mobile learning experiences appear while web-based learning, specially Learning Management Systems (LMS), are consolidated and widely adopted by learning institutions, teachers and learners. The innovation techniques breeding in the experimental world of mobile learning need to be translated into the mainstream echosystems. Mobile learning is not intended to replace elearning or web based learning, but to extend it. So, mobile learning applications need to be integrated somehow in the web-based LMS. To do so is needed to address interoperability issues on both ends: the LMS and the mobile application. Web Services and Service Oriented Architecture offer a standarized and effective way to achieve interoperability between syste...