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:string
iPXE> show filename net0.dhcp/filename:string = http://boot.ipxe.org/demo/boot.php
iPXE> show 40:string # Option 40 - NIS domain name net0.dhcp/40:string = nis.example.com
iPXE> set root-path iscsi:10.0.0.6::::iqn.2010-04.org.ipxe.dolphin:storage
Represents a type of setting that is a string.