Soft Book up to 13M, page-83

I found this definition of a "soft commitment" CR, which is pretty much what I thought it would mean.

Before a private equity fund is launched, the private equity firm, or general partner (GP), will solicit commitments to invest from potential investors, or limited partners (LPs). These ‘soft commitments’ are not legally binding and do not represent future subscriptions. They do, however, give the GP some indication of how much capital might be raised.