Next to everything we use today is produced by virtual enterprises. Fast development of technologies, wide proliferation of cloud services, upgrading means of big data processing and storage, virtualization is changing our ideas not only about modern enterprise but also about ways of building advanced corporate information systems (CIS). In conditions of continuously changing user requests to design a stable set of CIS services means for supplier to lose a considerable part of potential

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... s. The foundation of virtual enterprises acting actually as information systems of the new type includes a dynamic composition of services which can help to change quickly the current composition and to design a composition of a new enterprise using the core services. The authors propose to use the theory of formal grammar as a means of supporting the automated composition of services of virtual enterprise based on algorithms of intellectual planning.