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5 Conclusion and Future Work
The cloud market is developing rapidly with a dynamic environment of providers
and products. Searching for suitable resources in such a dynamic environment
is challenging. Little attention has been paid to describe a cloud application's
requirements at an appropriate level of abstraction. In this paper, an application-
centric multi-layer ontology for describing cloud application requirements is pro-
posed. This ontology provides a semantic mechanism for capturing application
needs in a language familiar from users' application domains. Two examples
are used to illustrate the formulation of application requirements. We hope to
enhance the ontology by studying other application domains. We also hope to de-
velop techniques for mapping user requirements into infrastructure constraints.
We believe that our approach offers an effective mechanism to compare and
select resources from a multi-provider cloud market.
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