CreateLayerDefinitionXml
This method creates the XML layer definition information for vector layers. It does this by calling CreateLayerDefinitionObject and serializing the returned layer definition object, which CreateLayerDefinitionXml then returns as a string. It takes six arguments: a layer definition name, an MgResourceIdentifier object identifying the feature source supplying the features for the layer, a schema name, a class name, a geometry property name, and a geometric type. The geometric type is a value in the MgFeatureGeometricType enumeration.