<｜begin▁of▁sentence｜>
### Instruction:
What is a composite bootable file in IOS XR?
### Response:
A composite bootable file (e.g., comp-hfr-mini.vm-3.6.0) is a single file that contains all the packages needed to boot a router and provide full routing functionality. It includes the base OS, routing protocols, forwarding, and management packages. Composite bootable files simplify the process of installing and booting IOS XR.
<|EOT|>
