Open Geospatial Consortium (OGC) compliant
"The Open Geospatial Consortium (OGC®) provides international standards that are implemented worldwide in thousands of applications that use location information. To reduce the risk of applications not implementing a standard correctly, the OGC provides a compliance process for testing and certifying implementations. OGC certification provides substantial evidence that an implementation that is claimed to have implemented an OGC standard will interoperate as specified and in the same manner as other compliant implementations, regardless of who developed them." (Open Geospatial Consortium 2015)
Sources
Open Geospatial Consortium. 2015. “OGC Compliance Overview - Guide for Software Acquisition.”