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In OpenNaaS source code, resource descriptor is defined by org.opennaas.core.resources.descriptor.ResourceDescriptor Java class in org.opennaas.core.resources project. Samples of Resource descriptors can be found in utils/examples/descriptors folder.
Resource Model
The Resource Model is a description of a resource which contains all the information that OpenNaaS can access from it. It is based in the CIM specification.
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