Software coordination and adaptation are tightly related to modular software entities and access points. These entities (components or services) may be complex, dissimilar (various models) and designed at different granularity levels. In order to allow interoperability we need rich interface descriptions including service hierarchisation, flexible declarations and precise specifications. In this article we present a Hierarchical Behavioural interface description language that enables the

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... ring of services, their encapsulation and it also facilitates the use of component interfaces. We also investigate in this work the adaptation for Hierarchical Behavioural IDL. We recall various adaptation problems and we introduce modelling techniques and some solutions within hierarchical context considering precision of the interfaces, their layering and flexibility.