SoPickedPoint(3) on Linux
The text ac2e42f76668, as Debian 8 (Jessie) shipped it.
The SoPickedPoint class is used for specifying picked points. It holds miscellaneous information about the picked point, such as position, normal, texture coordinate and material index in the current material. It might also hold detail information (an SoDetail subclass) for every node in the picked path.