<s>
Perl	B-Language
Object-Oriented	I-Language
Persistence	I-Language
(	O
POOP	O
)	O
is	O
the	O
term	O
given	O
to	O
refer	O
to	O
object-relational	B-General_Concept
mapping	I-General_Concept
mechanisms	O
written	O
in	O
the	O
Perl	B-Language
programming	I-Language
language	I-Language
to	O
provide	O
object	O
persistence	B-Application
.	O
</s>
<s>
RDBMS-OO	O
Mappers	O
:	O
These	O
tools	O
attempt	O
to	O
map	O
RDBMS	O
data	O
structures	O
(	O
tables	O
,	O
columns	O
,	O
rows	O
)	O
onto	O
Perl	B-Language
objects	O
.	O
</s>
<s>
OO-Persistence	O
Tools	O
:	O
These	O
tools	O
attempt	O
to	O
map	O
Perl	B-Language
objects	O
into	O
an	O
arbitrary	O
format	O
,	O
often	O
an	O
RDBMS	O
.	O
</s>
