In CBSD, the possible benefits of COTS software development, such as low cost, low risk, and high quality, cannot be satisfactorily achieved due to inadequate and/or incomplete proposals for component specification. In particular, non-functional aspects play an important role for components description and selection, but are usually not taken into account when documenting components and searching for them. In this paper, non-functional features of commercial components are analyzed, and a template for collecting this kind of information in XML documents is proposed in order to allow effective COTS components trading.