Features from Capabilities

HI, Is there any documentation or somewhere I can look at features that could be selected? I have started to create an extract from capabilities and domcapabilities to provide a list I can use for selection. Example these are the following entries I have selected to allow running of Hyperv in Server 2019 <features> <acpi/> <apic/> <hyperv mode='custom'> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> <vendor_id state='on' value='none'/> </hyperv> </features> <cpu mode='custom' match='strict' check='none'> <model fallback='forbid'>Skylake-Client-IBRS</model> <topology sockets='1' dies='1' clusters='1' cores='4' threads='1'/> </cpu> <clock offset='localtime'> <timer name='hpet' present='no'/> <timer name='hypervclock' present='no'/> </clock> But looking to find a list of options that would be valid to be specified. Regards Simon.