What's the meaning of some messages issued by objdump

[Parmenides <mobile dot parmenides at gmail dot com>]

Hi,
   The command line is like this
                          objdump -h tst.o
and the messages as follows

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         0000005e  00000000  00000000  00000034  2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  1 .data         00000008  00000000  00000000  00000094  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  2 .bss          00000004  00000000  00000000  0000009c  2**2
                  ALLOC
  3 .rodata       00000004  00000000  00000000  0000009c  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  4 .comment      00000012  00000000  00000000  000000a0  2**0
                  CONTENTS, READONLY
  5 .note.GNU-stack 00000000  00000000  00000000  000000b2  2**0
                  CONTENTS, READONLY

What's the meaning of CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE,
DATA. I can not get the
explanation from the manual.