AbstractThis paper reports the re-engineering efforts for OWL-Q, a prominent semantic quality-based service description language. These efforts have focused on making OWL-Q more compact without reducing its level of expressiveness as well as enriching it with semantic rules towards semantic validation of quality specifications and new knowledge derivation. It also presents a new OWL-Q extension called Q-SLA advancing the state-of-the-art by covering all possible information aspects needed which along with the semantic rules enable proper and automatic support to all service management activities. A particular use-case is also provided to highlight the main benefits of Q-SLA.