<s>
A	O
document-oriented	B-General_Concept
database	I-General_Concept
,	O
or	O
document	B-General_Concept
store	I-General_Concept
,	O
is	O
a	O
computer	B-Application
program	I-Application
and	O
data	O
storage	O
system	O
designed	O
for	O
storing	O
,	O
retrieving	O
and	O
managing	O
document-oriented	O
information	O
,	O
also	O
known	O
as	O
semi-structured	B-General_Concept
data	I-General_Concept
.	O
</s>
<s>
Document-oriented	B-General_Concept
databases	I-General_Concept
are	O
one	O
of	O
the	O
main	O
categories	O
of	O
NoSQL	B-General_Concept
databases	O
,	O
and	O
the	O
popularity	O
of	O
the	O
term	O
"	O
document-oriented	B-General_Concept
database	I-General_Concept
"	O
has	O
grown	O
with	O
the	O
use	O
of	O
the	O
term	O
NoSQL	B-General_Concept
itself	O
.	O
</s>
<s>
XML	B-Application
databases	I-Application
are	O
a	O
subclass	O
of	O
document-oriented	B-General_Concept
databases	I-General_Concept
that	O
are	O
optimized	O
to	O
work	O
with	O
XML	B-Protocol
documents	I-Protocol
.	O
</s>
<s>
Graph	B-Application
databases	I-Application
are	O
similar	O
,	O
but	O
add	O
another	O
layer	O
,	O
the	O
relationship	O
,	O
which	O
allows	O
them	O
to	O
link	O
documents	O
for	O
rapid	O
traversal	O
.	O
</s>
<s>
Document-oriented	B-General_Concept
databases	I-General_Concept
are	O
inherently	O
a	O
subclass	O
of	O
the	O
key-value	B-Data_Structure
store	I-Data_Structure
,	O
another	O
NoSQL	B-General_Concept
database	O
concept	O
.	O
</s>
<s>
The	O
difference	O
lies	O
in	O
the	O
way	O
the	O
data	O
is	O
processed	O
;	O
in	O
a	O
key-value	B-Data_Structure
store	I-Data_Structure
,	O
the	O
data	O
is	O
considered	O
to	O
be	O
inherently	O
opaque	O
to	O
the	O
database	O
,	O
whereas	O
a	O
document-oriented	O
system	O
relies	O
on	O
internal	O
structure	O
in	O
the	O
document	O
in	O
order	O
to	O
extract	O
metadata	O
that	O
the	O
database	B-General_Concept
engine	I-General_Concept
uses	O
for	O
further	O
optimization	O
.	O
</s>
<s>
Document	B-General_Concept
databases	I-General_Concept
contrast	O
strongly	O
with	O
the	O
traditional	O
relational	B-Application
database	I-Application
(	O
RDB	O
)	O
.	O
</s>
<s>
Relational	B-Application
databases	I-Application
generally	O
store	O
data	O
in	O
separate	O
tables	O
that	O
are	O
defined	O
by	O
the	O
programmer	O
,	O
and	O
a	O
single	O
object	O
may	O
be	O
spread	O
across	O
several	O
tables	O
.	O
</s>
<s>
Document	B-General_Concept
databases	I-General_Concept
store	O
all	O
information	O
for	O
a	O
given	O
object	O
in	O
a	O
single	O
instance	O
in	O
the	O
database	O
,	O
and	O
every	O
stored	O
object	O
can	O
be	O
different	O
from	O
every	O
other	O
.	O
</s>
<s>
This	O
eliminates	O
the	O
need	O
for	O
object-relational	B-General_Concept
mapping	I-General_Concept
while	O
loading	O
data	O
into	O
the	O
database	O
.	O
</s>
<s>
The	O
central	O
concept	O
of	O
a	O
document-oriented	B-General_Concept
database	I-General_Concept
is	O
the	O
notion	O
of	O
a	O
document	O
.	O
</s>
<s>
While	O
each	O
document-oriented	B-General_Concept
database	I-General_Concept
implementation	O
differs	O
on	O
the	O
details	O
of	O
this	O
definition	O
,	O
in	O
general	O
,	O
they	O
all	O
assume	O
documents	O
encapsulate	O
and	O
encode	O
data	O
(	O
or	O
information	O
)	O
in	O
some	O
standard	O
format	O
or	O
encoding	O
.	O
</s>
<s>
Encodings	O
in	O
use	O
include	O
XML	B-Protocol
,	O
YAML	B-Protocol
,	O
JSON	B-General_Concept
,	O
as	O
well	O
as	O
binary	O
forms	O
like	O
BSON	B-Protocol
.	O
</s>
<s>
Documents	O
in	O
a	O
document	B-General_Concept
store	I-General_Concept
are	O
roughly	O
equivalent	O
to	O
the	O
programming	O
concept	O
of	O
an	O
object	O
.	O
</s>
<s>
Document	B-General_Concept
stores	I-General_Concept
are	O
similar	O
in	O
that	O
they	O
allow	O
different	O
types	O
of	O
documents	O
in	O
a	O
single	O
store	O
,	O
allow	O
the	O
fields	O
within	O
them	O
to	O
be	O
optional	O
,	O
and	O
often	O
allow	O
them	O
to	O
be	O
encoded	O
using	O
different	O
encoding	O
systems	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
following	O
is	O
a	O
document	O
,	O
encoded	O
in	O
JSON	B-General_Concept
:	O
</s>
<s>
A	O
second	O
document	O
might	O
be	O
encoded	O
in	O
XML	B-Protocol
as	O
:	O
</s>
<s>
Unlike	O
a	O
relational	B-Application
database	I-Application
where	O
every	O
record	O
contains	O
the	O
same	O
fields	O
,	O
leaving	O
unused	O
fields	O
empty	O
;	O
there	O
are	O
no	O
empty	O
'	O
fields	O
 '	O
in	O
either	O
document	O
(	O
record	O
)	O
in	O
the	O
above	O
example	O
.	O
</s>
<s>
Document	B-General_Concept
databases	I-General_Concept
typically	O
provide	O
for	O
additional	O
metadata	O
to	O
be	O
associated	O
with	O
and	O
stored	O
along	O
with	O
the	O
document	O
content	O
.	O
</s>
<s>
The	O
core	O
operations	O
that	O
a	O
document-oriented	B-General_Concept
database	I-General_Concept
supports	O
for	O
documents	O
are	O
similar	O
to	O
other	O
databases	O
,	O
and	O
while	O
the	O
terminology	O
is	O
not	O
perfectly	O
standardized	O
,	O
most	O
practitioners	O
will	O
recognize	O
them	O
as	O
CRUD	B-General_Concept
:	O
</s>
<s>
This	O
key	O
is	O
a	O
simple	O
identifier	O
(	O
or	O
ID	O
)	O
,	O
typically	O
a	O
string	O
,	O
a	O
URI	B-Protocol
,	O
or	O
a	O
path	B-Application
.	O
</s>
<s>
Typically	O
the	O
database	O
retains	O
an	O
index	B-Data_Structure
on	O
the	O
key	O
to	O
speed	O
up	O
document	O
retrieval	O
,	O
and	O
in	O
some	O
cases	O
the	O
key	O
is	O
required	O
to	O
create	O
or	O
insert	O
the	O
document	O
into	O
the	O
database	O
.	O
</s>
<s>
Another	O
defining	O
characteristic	O
of	O
a	O
document-oriented	B-General_Concept
database	I-General_Concept
is	O
that	O
,	O
beyond	O
the	O
simple	O
key-to-document	O
lookup	O
that	O
can	O
be	O
used	O
to	O
retrieve	O
a	O
document	O
,	O
the	O
database	O
offers	O
an	O
API	O
or	O
query	B-Language
language	I-Language
that	O
allows	O
the	O
user	O
to	O
retrieve	O
documents	O
based	O
on	O
content	O
(	O
or	O
metadata	O
)	O
.	O
</s>
<s>
For	O
example	O
,	O
you	O
may	O
want	O
a	O
query	B-Library
that	O
retrieves	O
all	O
the	O
documents	O
with	O
a	O
certain	O
field	O
set	O
to	O
a	O
certain	O
value	O
.	O
</s>
<s>
The	O
set	O
of	O
query	B-Library
APIs	O
or	O
query	B-Language
language	I-Language
features	O
available	O
,	O
as	O
well	O
as	O
the	O
expected	O
performance	O
of	O
the	O
queries	B-Library
,	O
varies	O
significantly	O
from	O
one	O
implementation	O
to	O
another	O
.	O
</s>
<s>
It	O
is	O
here	O
that	O
the	O
document	B-General_Concept
store	I-General_Concept
varies	O
most	O
from	O
the	O
key-value	B-Data_Structure
store	I-Data_Structure
.	O
</s>
<s>
In	O
theory	O
,	O
the	O
values	O
in	O
a	O
key-value	B-Data_Structure
store	I-Data_Structure
are	O
opaque	O
to	O
the	O
store	O
,	O
they	O
are	O
essentially	O
black	O
boxes	O
.	O
</s>
<s>
They	O
may	O
offer	O
search	O
systems	O
similar	O
to	O
those	O
of	O
a	O
document	B-General_Concept
store	I-General_Concept
,	O
but	O
may	O
have	O
less	O
understanding	O
about	O
the	O
organization	O
of	O
the	O
content	O
.	O
</s>
<s>
Document	B-General_Concept
stores	I-General_Concept
use	O
the	O
metadata	O
in	O
the	O
document	O
to	O
classify	O
the	O
content	O
,	O
allowing	O
them	O
,	O
for	O
instance	O
,	O
to	O
understand	O
that	O
one	O
series	O
of	O
digits	O
is	O
a	O
phone	O
number	O
,	O
and	O
another	O
is	O
a	O
postal	O
code	O
.	O
</s>
<s>
Document	B-General_Concept
databases	I-General_Concept
typically	O
provide	O
some	O
mechanism	O
for	O
updating	O
or	O
editing	O
the	O
content	O
(	O
or	O
metadata	O
)	O
of	O
a	O
document	O
,	O
either	O
by	O
allowing	O
for	O
replacement	O
of	O
the	O
entire	O
document	O
,	O
or	O
individual	O
structural	O
pieces	O
of	O
the	O
document	O
.	O
</s>
<s>
A	O
document-oriented	B-General_Concept
database	I-General_Concept
is	O
a	O
specialized	O
key-value	B-Data_Structure
store	I-Data_Structure
,	O
which	O
itself	O
is	O
another	O
NoSQL	B-General_Concept
database	O
category	O
.	O
</s>
<s>
In	O
a	O
simple	O
key-value	B-Data_Structure
store	I-Data_Structure
,	O
the	O
document	O
content	O
is	O
opaque	O
.	O
</s>
<s>
A	O
document-oriented	B-General_Concept
database	I-General_Concept
provides	O
APIs	O
or	O
a	O
query/update	O
language	O
that	O
exposes	O
the	O
ability	O
to	O
query	B-Library
or	O
update	O
based	O
on	O
the	O
internal	O
structure	O
in	O
the	O
document	O
.	O
</s>
<s>
This	O
difference	O
may	O
be	O
minor	O
for	O
users	O
that	O
do	O
not	O
need	O
richer	O
query	B-Library
,	O
retrieval	O
,	O
or	O
editing	O
APIs	O
that	O
are	O
typically	O
provided	O
by	O
document	B-General_Concept
databases	I-General_Concept
.	O
</s>
<s>
Modern	O
key-value	B-Data_Structure
stores	I-Data_Structure
often	O
include	O
features	O
for	O
working	O
with	O
metadata	O
,	O
blurring	O
the	O
lines	O
between	O
document	B-General_Concept
stores	I-General_Concept
.	O
</s>
<s>
Some	O
search	O
engine	O
(	O
aka	O
information	B-Library
retrieval	I-Library
)	O
systems	O
like	O
Apache	B-Language
Solr	I-Language
and	O
Elasticsearch	B-Application
provide	O
enough	O
of	O
the	O
core	O
operations	O
on	O
documents	O
to	O
fit	O
the	O
definition	O
of	O
a	O
document-oriented	B-General_Concept
database	I-General_Concept
.	O
</s>
<s>
In	O
a	O
relational	B-Application
database	I-Application
,	O
data	O
is	O
first	O
categorized	O
into	O
a	O
number	O
of	O
predefined	O
types	O
,	O
and	O
tables	O
are	O
created	O
to	O
hold	O
individual	O
entries	O
,	O
or	O
records	O
,	O
of	O
each	O
type	O
.	O
</s>
<s>
This	O
design	O
is	O
known	O
as	O
database	B-Application
normalization	I-Application
.	O
</s>
<s>
In	O
a	O
canonical	O
relational	B-Application
database	I-Application
,	O
tables	O
would	O
be	O
created	O
for	O
each	O
of	O
these	O
rows	O
with	O
predefined	O
fields	O
for	O
each	O
bit	O
of	O
data	O
:	O
the	O
CONTACT	O
table	O
might	O
include	O
FIRST_NAME	O
,	O
LAST_NAME	O
and	O
IMAGE	O
columns	O
,	O
while	O
the	O
PHONE_NUMBER	O
table	O
might	O
include	O
COUNTRY_CODE	O
,	O
AREA_CODE	O
,	O
PHONE_NUMBER	O
and	O
TYPE	O
(	O
home	O
,	O
work	O
,	O
etc	O
.	O
)	O
.	O
</s>
<s>
In	O
order	O
to	O
recreate	O
the	O
original	O
contact	O
,	O
the	O
database	B-General_Concept
engine	I-General_Concept
uses	O
the	O
foreign	O
keys	O
to	O
look	O
for	O
the	O
related	O
items	O
across	O
the	O
group	O
of	O
tables	O
and	O
reconstruct	O
the	O
original	O
data	O
.	O
</s>
<s>
In	O
contrast	O
,	O
in	O
a	O
document-oriented	B-General_Concept
database	I-General_Concept
there	O
may	O
be	O
no	O
internal	O
structure	O
that	O
maps	O
directly	O
onto	O
the	O
concept	O
of	O
a	O
table	O
,	O
and	O
the	O
fields	O
and	O
relationships	O
generally	O
do	O
n't	O
exist	O
as	O
predefined	O
concepts	O
.	O
</s>
<s>
This	O
leads	O
to	O
problems	O
when	O
trying	O
to	O
translate	O
programming	O
objects	O
to	O
and	O
from	O
their	O
associated	O
database	O
rows	O
,	O
a	O
problem	O
known	O
as	O
object-relational	B-Architecture
impedance	I-Architecture
mismatch	I-Architecture
.	O
</s>
<s>
Document	B-General_Concept
stores	I-General_Concept
more	O
closely	O
,	O
or	O
in	O
some	O
cases	O
directly	O
,	O
map	O
programming	O
objects	O
into	O
the	O
store	O
.	O
</s>
<s>
These	O
are	O
often	O
marketed	O
using	O
the	O
term	O
NoSQL	B-General_Concept
.	O
</s>
<s>
Name	O
Publisher	O
License	O
Languages	O
supported	O
Notes	O
RESTful	B-Protocol
API	I-Protocol
Aerospike	B-Operating_System
Aerospike	B-Operating_System
and	O
Proprietary	B-Application
C	B-Language
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Scala	B-Application
,	O
Python	B-Language
,	O
Node.js	B-Language
,	O
PHP	B-Application
,	O
Go	B-Application
,	O
Rust	B-Application
,	O
Spring	B-Application
Framework	I-Application
Aerospike	B-Operating_System
is	O
a	O
flash-optimized	O
and	O
in-memory	B-General_Concept
distributed	O
key	B-Application
value	I-Application
NoSQL	B-General_Concept
database	O
which	O
also	O
supports	O
a	O
document	B-General_Concept
store	I-General_Concept
model	O
.	O
</s>
<s>
AllegroGraph	B-Language
Franz	O
,	O
Inc	O
.	O
Java	B-Language
,	O
Python	B-Language
,	O
Common	B-Language
Lisp	I-Language
,	O
Ruby	B-Language
,	O
Scala	B-Application
,	O
C#	B-Application
,	O
Perl	B-Language
The	O
database	O
platform	O
supports	O
document	B-General_Concept
store	I-General_Concept
and	O
graph	O
data	O
models	O
in	O
a	O
single	O
database	O
.	O
</s>
<s>
Supports	O
JSON	B-General_Concept
,	O
JSON-LD	B-Protocol
,	O
RDF	O
,	O
full-text	B-Application
search	I-Application
,	O
ACID	O
,	O
two-phase	B-General_Concept
commit	I-General_Concept
,	O
Multi-Master	B-Operating_System
Replication	I-Operating_System
,	O
Prolog	B-Language
and	O
SPARQL	B-Language
.	O
</s>
<s>
ArangoDB	B-Operating_System
ArangoDB	B-Operating_System
C	B-Language
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
Node.js	B-Language
,	O
PHP	B-Application
,	O
Scala	B-Application
,	O
Go	B-Application
,	O
Ruby	B-Language
,	O
Elixir	B-Language
The	O
database	O
system	O
supports	O
document	B-General_Concept
store	I-General_Concept
as	O
well	O
as	O
key/value	B-Application
and	O
graph	O
data	O
models	O
with	O
one	O
database	O
core	O
and	O
a	O
unified	O
query	B-Language
language	I-Language
AQL	O
(	O
ArangoDB	B-Operating_System
Query	B-Language
Language	I-Language
)	O
.	O
</s>
<s>
BaseX	B-Language
BaseX	B-Language
Team	O
Java	B-Language
,	O
XQuery	B-Language
Support	O
for	O
XML	B-Protocol
,	O
JSON	B-General_Concept
and	O
binary	O
formats	O
;	O
client-/server	O
based	O
architecture	O
;	O
concurrent	O
structural	O
and	O
full-text	B-Application
searches	I-Application
and	O
updates	O
.	O
</s>
<s>
Caché	B-Language
InterSystems	B-Application
Corporation	O
Java	B-Language
,	O
C#	B-Application
,	O
Node.js	B-Language
Commonly	O
used	O
in	O
Health	O
,	O
Business	O
and	O
Government	O
applications	O
.	O
</s>
<s>
Cloudant	B-General_Concept
Cloudant	B-General_Concept
,	O
Inc	O
.	O
Erlang	B-Operating_System
,	O
Java	B-Language
,	O
Scala	B-Application
,	O
and	O
C	B-Language
Distributed	O
database	O
service	O
based	O
on	O
BigCouch	B-General_Concept
,	O
the	O
company	O
's	O
open	B-License
source	I-License
fork	O
of	O
the	O
Apache-backed	O
CouchDB	B-Application
project	O
.	O
</s>
<s>
Uses	O
JSON	B-General_Concept
model	O
.	O
</s>
<s>
Clusterpoint	B-Operating_System
Database	I-Operating_System
Clusterpoint	B-Operating_System
Ltd	O
.	O
with	O
free	O
download	O
JavaScript	B-Language
,	O
SQL	B-Language
,	O
PHP	B-Application
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
Node.js	B-Language
,	O
C	B-Language
,	O
C++	B-Language
,	O
Distributed	O
document-oriented	O
XML	B-Protocol
/	O
JSON	B-General_Concept
database	I-General_Concept
platform	O
with	O
ACID-compliant	O
transactions	B-General_Concept
;	O
high-availability	B-General_Concept
data	B-Architecture
replication	I-Architecture
and	O
sharding	B-General_Concept
;	O
built-in	O
full-text	B-Application
search	I-Application
engine	O
with	O
relevance	O
ranking	O
;	O
JS/SQL	O
query	B-Language
language	I-Language
;	O
GIS	B-Application
;	O
Available	O
as	O
pay-per-use	O
database	O
as	O
a	O
service	O
or	O
as	O
an	O
on-premise	O
free	O
software	O
download	O
.	O
</s>
<s>
Couchbase	B-Operating_System
Server	I-Operating_System
Couchbase	B-General_Concept
,	I-General_Concept
Inc	I-General_Concept
.	I-General_Concept
C	B-Language
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
Node.js	B-Language
,	O
PHP	B-Application
,	O
SQL	B-Language
,	O
Go	B-Application
,	O
Spring	B-Application
Framework	I-Application
,	O
LINQDistributed	O
NoSQL	B-General_Concept
Document	B-General_Concept
Database	I-General_Concept
,	O
JSON	B-General_Concept
model	O
and	O
SQL	B-Language
based	O
Query	B-Language
Language	I-Language
.	O
</s>
<s>
Couchbase	B-Operating_System
.	O
</s>
<s>
CouchDB	B-Application
Apache	B-Application
Software	O
Foundation	O
Any	O
language	O
that	O
can	O
make	O
HTTP	O
requests	O
JSON	B-General_Concept
over	O
REST/HTTP	O
with	O
Multi-Version	B-Operating_System
Concurrency	I-Operating_System
Control	I-Operating_System
and	O
limited	O
ACID	O
properties	O
.	O
</s>
<s>
Uses	O
map	O
and	O
reduce	B-Application
for	O
views	O
and	O
queries	B-Library
.	O
</s>
<s>
CrateIO	B-Application
CRATE	O
Technology	O
GmbH	O
Java	B-Language
Use	O
familiar	O
SQL	B-Language
syntax	O
for	O
real	O
time	O
distributed	O
queries	B-Library
across	O
a	O
cluster	O
.	O
</s>
<s>
Based	O
on	O
Lucene	O
/	O
Elasticsearch	B-Application
ecosystem	O
with	O
built-in	O
support	O
for	O
binary	O
objects	O
(	O
BLOBs	O
)	O
.	O
</s>
<s>
Cosmos	B-Application
DB	I-Application
Microsoft	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
Node.js	B-Language
,	O
JavaScript	B-Language
,	O
SQL	B-Language
Platform-as-a-Service	O
offering	O
,	O
part	O
of	O
the	O
Microsoft	B-Application
Azure	I-Application
platform	O
.	O
</s>
<s>
Builds	O
upon	O
and	O
extends	O
the	O
earlier	O
Azure	O
DocumentDB	B-Application
.	O
</s>
<s>
DocumentDBAmazon	O
Web	O
Services	O
Proprietary	B-Application
online	O
service	O
various	O
,	O
REST	O
fully	O
managed	O
MongoDB	B-Application
v3.6-compatible	O
database	O
serviceDynamoDBAmazon	O
Web	O
ServicesProprietaryJava	O
,	O
JavaScript	B-Language
,	O
Node.js	B-Language
,	O
Go	B-Application
,	O
C#	B-Application
.NET	B-Application
,	O
Perl	B-Language
,	O
PHP	B-Application
,	O
Python	B-Language
,	O
Ruby	B-Language
,	O
Rust	B-Application
,	O
Haskell	B-Language
,	O
Erlang	B-Operating_System
,	O
Django	B-Language
,	O
and	O
Grailsfully	O
managed	O
proprietary	B-Application
NoSQL	B-General_Concept
database	O
service	O
that	O
supports	O
key	B-Application
–	I-Application
value	I-Application
and	O
document	O
data	O
structuresYesElasticsearchShay	O
BanonJavaJSON	O
,	O
Search	O
engine	O
.	O
</s>
<s>
eXist	O
eXist	O
XQuery	B-Language
,	O
Java	B-Language
XML	B-Protocol
over	O
REST/HTTP	O
,	O
WebDAV	O
,	O
Lucene	O
Fulltext	B-Application
search	I-Application
,	O
binary	O
data	O
support	O
,	O
validation	O
,	O
versioning	O
,	O
clustering	O
,	O
triggers	O
,	O
URL	O
rewriting	O
,	O
collections	O
,	O
ACLS	O
,	O
XQuery	B-Language
Update	I-Language
eXist-db	O
Open	B-License
Source	I-License
Native	O
XML	B-Application
Database	I-Application
.	O
</s>
<s>
Informix	B-Application
IBM	O
Proprietary	B-Application
,	O
with	O
no-cost	O
editions	O
Various	O
(	O
Compatible	O
with	O
MongoDB	B-Application
API	O
)	O
RDBMS	O
with	O
JSON	B-General_Concept
,	O
replication	B-Architecture
,	O
sharding	B-General_Concept
and	O
ACID	O
compliance	O
.	O
</s>
<s>
JackrabbitApache	O
FoundationJavaJava	O
Content	O
Repository	O
implementation	O
HCL	B-Operating_System
Notes	I-Operating_System
(	O
HCL	B-Operating_System
Domino	I-Operating_System
)	O
HCL	O
LotusScript	B-Language
,	O
Java	B-Language
,	O
Notes	O
Formula	O
Language	O
MultiValue	B-Application
MarkLogic	O
MarkLogic	O
Corporation	O
Free	O
Developer	O
license	O
or	O
CommercialJava	O
,	O
JavaScript	B-Language
,	O
Node.js	B-Language
,	O
XQuery	B-Language
,	O
SPARQL	B-Language
,	O
XSLT	B-Application
,	O
C++	B-Language
Distributed	O
document-oriented	B-General_Concept
database	I-General_Concept
for	O
JSON	B-General_Concept
,	O
XML	B-Protocol
,	O
and	O
RDF	O
triples	O
.	O
</s>
<s>
Built-in	O
full-text	B-Application
search	I-Application
,	O
ACID	O
transactions	B-General_Concept
,	O
high	O
availability	O
and	O
disaster	B-General_Concept
recovery	I-General_Concept
,	O
certified	O
security	O
.	O
</s>
<s>
MongoDB	B-Application
MongoDB	B-Application
,	O
Inc	O
C	B-Language
,	O
C++	B-Language
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Perl	B-Language
,	O
PHP	B-Application
,	O
Python	B-Language
,	O
Go	B-Application
,	O
Node.js	B-Language
,	O
Ruby	B-Language
,	O
Rust	B-Application
,	O
Scala	B-Application
Document	B-General_Concept
database	I-General_Concept
with	O
replication	B-Architecture
and	O
sharding	B-General_Concept
,	O
BSON	B-Protocol
store	O
(	O
binary	O
format	O
JSON	B-General_Concept
)	O
.	O
</s>
<s>
MUMPS	B-Language
Database	O
Proprietary	B-Application
and	O
Affero	O
GPL	O
MUMPS	B-Language
Commonly	O
used	O
in	O
health	O
applications	O
.	O
</s>
<s>
ObjectDatabase++	B-Application
Ekky	O
Software	O
C++	B-Language
,	O
C#	B-Application
,	O
TScript	B-Application
Binary	O
Native	O
C++	B-Language
class	O
structures	O
OpenLink	O
VirtuosoOpenLink	O
SoftwareGPLv2[1]	O
and	O
proprietaryC++	O
,	O
C#	B-Application
,	O
Java	B-Language
,	O
SPARQLMiddleware	O
and	O
database	B-General_Concept
engine	I-General_Concept
hybrid	O
OrientDB	B-Operating_System
Orient	O
Technologies	O
Java	B-Language
JSON	B-General_Concept
over	O
HTTP	O
,	O
SQL	B-Language
support	O
,	O
ACID	O
transactions	B-General_Concept
Oracle	O
NoSQL	B-General_Concept
DatabaseOracle	O
CorpApache	O
and	O
proprietaryC	O
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
node.js	B-Language
,	O
Go	B-Application
Shared	O
nothing	O
,	O
horizontally	O
scalable	O
database	O
with	O
support	O
for	O
schema-less	O
JSON	B-General_Concept
,	O
fixed	O
schema	O
tables	O
,	O
and	O
key/value	B-Application
pairs	I-Application
.	O
</s>
<s>
Also	O
supports	O
ACID	O
transactions.Yes	O
Qizx	B-Application
Qualcomm	O
REST	O
,	O
Java	B-Language
,	O
XQuery	B-Language
,	O
XSLT	B-Application
,	O
C	B-Language
,	O
C++	B-Language
,	O
Python	B-Language
Distributed	O
document-oriented	O
XML	B-Application
database	I-Application
with	O
integrated	O
full-text	B-Application
search	I-Application
;	O
support	O
for	O
JSON	B-General_Concept
,	O
text	O
,	O
and	O
binaries	O
.	O
</s>
<s>
RedisJSON	B-Operating_System
Redis	B-Operating_System
Redis	B-Operating_System
Source	O
Available	O
License	O
(	O
RSAL	O
)	O
Python	B-Language
JSON	B-General_Concept
with	O
integrated	O
full-text	B-Application
search	I-Application
.	O
</s>
<s>
RethinkDB	B-Operating_System
C++	B-Language
,	O
Python	B-Language
,	O
JavaScript	B-Language
,	O
Ruby	B-Language
,	O
Java	B-Language
Distributed	O
document-oriented	O
JSON	B-General_Concept
database	I-General_Concept
with	O
replication	B-Architecture
and	O
sharding.SAP	O
HANASAPSQL-like	O
languageACID	O
transaction	O
supported	O
,	O
JSON	B-General_Concept
only	O
Sednasedna.orgC	O
++	O
,	O
XQueryXML	O
database	O
SimpleDBAmazon	O
Web	O
Services	O
Proprietary	B-Application
online	O
serviceErlangApache	O
SolrApache	O
Software	O
FoundationJavaJSON	O
,	O
CSV	O
,	O
XML	B-Protocol
,	O
and	O
a	O
few	O
other	O
formats	O
.	O
</s>
<s>
TerminusDB	B-Application
TerminusDB	B-Application
Python	B-Language
,	O
Node.js	B-Language
,	O
JavaScriptThe	O
database	O
system	O
supports	O
document	B-General_Concept
store	I-General_Concept
as	O
well	O
as	O
graph	O
data	O
models	O
with	O
one	O
database	O
core	O
and	O
a	O
unified	O
,	O
datalog	B-Language
based	O
query	B-Language
language	I-Language
WOQL	O
(	O
Web	O
Object	O
Query	B-Language
Language	I-Language
)	O
.	O
</s>
<s>
Most	O
XML	B-Application
databases	I-Application
are	O
document-oriented	B-General_Concept
databases	I-General_Concept
.	O
</s>
