This information is part of the Modelica Standard Library maintained by the Modelica Association.
This partial model provides two frame connectors, access to the world object and an assert to check that both frame connectors are connected. Therefore, inherit from this partial model if the two frame connectors are needed and if the two frame connectors should be connected for a correct model.
When dragging "PartialTwoFrames", the default size is a factor of two larger as usual. This partial model is used by the Joint.Assemblies joint aggregation models.