This JSON Schema describes a standard format for commercial real estate transaction data exchange. Read more about JSON and JSON Schema here: https://json-schema.org/blog/posts/json-schema-in-5-minutes.
Source spreadsheet file (collaborative): https://docs.google.com/spreadsheets/d/1FO4h40Ax7_4CjBCEW85okOCGrCpTS7X2bIBvpv1Xczo/