Content adaptation is crucial for universal Web access under varying conditions that may depend on device capabilities, network connectivity, user preferences, or user disabilities. Semantic annotations provide additional information about Web contents so that a content adaptation engine, based on Semantic Web technologies, can make better decisions on content repurposing. This paper presents MorfeoSMC: an open source advanced component-based platform that enables the development of semantics-aware mobile applications and services, and that solves the problem of how to make Web content usable on mobile devices. In particular, the paper focuses on how MorfeoSMC tackles the use of semantic markup in the information rendered for users through the mobility platform and in the Web content adaptation process. It also presents an innovative semantic matching framework for both services delivered in mobile environments and Web contents produced by these services. This framework is at the core of the semantics-aware Web content adaptation process.