PT_NOTE section in the ELF header

Hi All,
I was looking through the below link:

http://www.netbsd.org/docs/kernel/elf-notes.html

I was confused as to why we have something linke 1f - 0f, 3f - 2f:
****************************************************************************************************************
.long 1f - 0f # name size (not including padding)
.long 3f - 2f # desc size (not including padding)
****************************************************************************************************************

Why can't this be simply .long 1f
.long 1f ? I am assuming you just
have to subtract 3f - 2f = 1f.

Could someone please explain me this?

Regards,
/prix prad
.