SoVectorOutput(3) on Linux
The text 15743ab7d06d, as Debian 7 (Wheezy) shipped it.
The SoVectorOutput class is used for setting vector output file. SoVectorizeAction will create an SoVectorOutput which will output to stdout by default. SoVectorizeAction::getOutput() can be used to fetch this output, and the user will probably want to set a file to output to.