This document discusses the development of a potential Open Geospatial Consortium (OGC) standard called ParkingML, ParkinGML, or ParkINFO to define an open data model and encoding for sharing real-time parking availability information. It outlines a vision for drivers to easily find available parking spaces through their devices. Challenges that would need to be addressed include low-cost methods to detect parking space availability and disseminate the information to end users. The standard could help establish new business models for sharing parking data.