Where to store Process architecture?

[erikloman]

On a 64-bit Windows platform, a process can run as either an x86 or x64 process.
On a Windows on Arm platform, a process can run as an x86, x64, ARM64, or ARM process.

In which attribute can I store architecture information related to a process?

I see there is an xattributes attribute to store process extended attributes.

Would something look like this?

"process" : {
  ...
  "xattributes" : {
    "arch" : "x86"
  }
}