What is GroundWaterML2?

From the dedicated page on the OGC Website:

This standard describes a conceptual and logical model for the exchange of groundwater data, as well as a GML/XML encoding with examples.

The latest version of the specifications of that OGC standard can be found here: https://docs.ogc.org/is/19-013/19-013.html

Which existing concepts do we propose to reuse and extend for geotechnics?

• HydroGeoUnit
• FluidBody
• FluidBodysurface
• HydroGeoVoid