Does Openmrs APIs follow HL7 message standerd?

Development
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1. I want to know does Openmrs API  Get/Post returns us response in HL7 format? Yes/NO.

2. If No then ,what are the steps to be follow to achieve the same.
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Could this be of help https://wiki.openmrs.org/pages/viewpage.action?pageId=13599071?