<s>
DataMapper	B-Application
is	O
an	O
object-relational	B-General_Concept
mapper	I-General_Concept
library	B-Library
written	O
in	O
Ruby	B-Language
that	O
follows	O
the	O
active	O
record	O
pattern	O
even	O
though	O
the	O
name	O
implies	O
it	O
follows	O
the	O
data	O
mapper	O
pattern	O
.	O
</s>
<s>
While	O
DataMapper	B-Application
1	O
may	O
not	O
have	O
achieved	O
total	O
decoupling	O
between	O
object	O
and	O
database	O
suggested	O
by	O
the	O
data	O
mapper	O
pattern	O
,	O
it	O
appears	O
DataMapper	B-Application
2	O
intended	O
to	O
change	O
this	O
(	O
a	O
la	O
Virtus	O
,	O
a	O
library	B-Library
adapted	O
from	O
DataMapper	B-Application
)	O
.	O
</s>
<s>
The	O
DataMapper	B-Application
2	O
project	O
was	O
renamed	O
before	O
launch	O
and	O
was	O
released	O
as	O
Ruby	B-Language
Object	O
Mapper	O
(	O
ROM	O
)	O
in	O
August	O
2013	O
.	O
</s>
<s>
Some	O
features	O
of	O
DataMapper	B-Application
:	O
</s>
<s>
DataMapper	B-Application
was	O
designed	O
to	O
be	O
a	O
more	O
abstract	O
ORM	O
,	O
not	O
strictly	O
SQL	O
,	O
based	O
on	O
Martin	O
Fowler	O
's	O
enterprise	O
pattern	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
DataMapper	B-Application
adapters	O
have	O
been	O
built	O
for	O
other	O
non-SQL	O
databases	O
,	O
such	O
as	O
CouchDB	B-Application
,	O
Apache	B-Language
Solr	I-Language
,	O
and	O
webservices	O
such	O
as	O
Salesforce.com	B-Application
.	O
</s>
