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Mobile applications need to dynamically adapt to requirements of new environments (or locations) as users and their devices continuously move. Service oriented architecture (SOA) is a recent approach for designing and developing open and distributed systems. However, SOA has to be extended in order to fully accommodate the requirements of mobile services. This paper presents an approach called AmbientSoaML, which introduces ambients in service oriented architecture modeling language (SoaML) proposed by the OMG in order to allow its models to include mobility primitives. Ambients are considered to be the service providers and the service consumers for providing/consuming mobility services. They also represent the boundaries that services have to cross when moving from one location to another. This paper demonstrates the use of SoaML for modeling SOA of a mobile application in order to motivate the problem our research purports to address.