[link_id], key1, value1
[link_id], key2, value2


##</code><code>##

name=bob, age=75, [ hair=balding, glasses=bifocal]
name=john, age=20, [ sport=chess ]

##</code><code>##

1, bob, 45
2, john, 20

##</code><code>##

1,hair,balding
1,glasses,bifocal
2,sport,chess