Producing ethylene through oxidative coupling of methane(OCM)is the main focus in natural gas conversion field in the world since 1980s.

The annotations (shown in bold) on each class definition and most of the field definitions supply configuration information that JAXB USES to control the conversion of objects to and from XML.

Custom data conversion is necessary if you need to convert field data into an application-specific value object, as in the following examples.