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Yes. Maven is completely SOA enabled. There are live Maven deployments using SOA for both realtime and batch integration. In addition to web-services Maven supports integration through messaging and files.

Maven components can be called out through web-services as well. Most popularly Maven Data Importer and Exporter is typically called via web-services. Maven deduplication module is also exposed as a web-service.

Maven data importer/exporter also uses a well-defined XML document (via the Maven Integration Format xsd) so that XML data structure is easy to understand, easy to create and easy to parse.