SoCoordinate3(3) on Linux
The text 73db04ce2a24, as Debian 4.0 (Etch) shipped it.
The SoCoordinate3 class is a node for providing coordinates to shape nodes. When encountering nodes of this type during traversal, the coordinates it contains will be put on the state stack for later use by shape nodes of types which needs coordinate sets (like SoFaceSet nodes or SoPointSet nodes).