Currently, two political perspectives on existing infrastructures are competing in Switzerland - critical infrastructure protection (CIP) and infrastructure planning (IP). This so-called ambiguity in perspectives is aligned with ambiguity in information. The semantic coordination of communities of practice (CoP) - placement of CIP and IP into the hierarchical classification systems of online documents and websites that have been created by the respective CoP's - as well as the participation of information and communication technologies (ICT) were analysed by means of a suggested typology of terms. The concluding hypotheses are 1) CoP are governing ambiguity collectively and based on fragmented and existing, but coherent discourses, 2) in order to uphold their capacity to act, and 3) CoP are different in terms of their semantic coordination. The results are meaningful for the design of deliberative spaces and for the emerging field of "risk governance".