in order to integrate with any REST API, front-end frameworks in particular, the data  go back and fourth between odoo as a back-end framework and the other front-end framework should being serialized , ("serialized" here means that the data should be transform to one of the formats ( JSON, XML, YAML) ). what i'm asking here is there any ability to link odoo CRM for example with the outside front-end interface, is there any reference can guide with the serialization process ?