Thinking there might be a good way to add in a piece to represent who/where/how this characteristic was assigned, considering that the idea of "explicit" could change over time. George B. has developed some models that would likely fit in nicely, waiting to hear back from him as of 02/22/23.

We discussed distinguishing between whether or not this data is populated by human or machine, but still figuring out the right branch/class/property.