Where is the documentation for the DSP libraries? (w1res)

I'm using XC16 version 1.22. If I open "C:\Program Files (x86)\Microchip\xc16\v1.22\docs\16-Bit_Language_Tools_Libraries_Manual.pdf", it says that the DSP library documentation should be inside of "docs\dsp_lib". I don't see this anywhere. Also, when I op..