---
title: "Extended JSON Specifications"
canonical: "https://docs.infoblox.com/space/APIDeveloperGuide/43025681/Extended%20JSON%20Specifications"
format: markdown
---
The NetMRI API uses standard JSON as described in RFC 4627, with the following additional convention. For Object primitives, the key “_class” (an underscore followed by the word “class”) is reserved to indicate the class name of the object. This is equivalent to the model-type rule described in the XML specification below.