About: http://webisa.webdatacommons.org/450902209

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Bascially, bootloader is a software that before your operating system, it allows your operating system to load, unlocking bootloader allows you to install new OS's, and a locked bootloader doesn't.
http://www.w3.org/ns/prov#wasQuotedFrom	xda-developers.com