Over in the community forum, I have finally gotten around to posting the prototype for my serialization library. The prototype supports serialization to and from JSON for 9 data types and to XML (my own schema) for the same 9 (listed below).
https://decibel.ni.com/content/docs/DOC-24015
Please take a look. I've made it a priority to finish out the data type support for the framework generally and for the JSON format specifically. I will need community help to tackle any other formats: the framework is designed to make a single pair of functions on a class handle any file format, but the particular formats on the back end are not my specialty.
Please post all feedback on the ni.com site so that they stay all in one place and I can follow the threads easier.