<s>
Microsoft	B-Application
SQL	I-Application
Server	I-Application
Master	I-Application
Data	I-Application
Services	I-Application
(	O
MDS	O
)	O
is	O
a	O
Master	B-General_Concept
Data	I-General_Concept
Management	I-General_Concept
(	O
MDM	O
)	O
product	O
from	O
Microsoft	O
that	O
ships	O
as	O
a	O
part	O
of	O
the	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
relational	O
database	O
management	O
system	O
.	O
</s>
<s>
Master	B-General_Concept
data	I-General_Concept
management	I-General_Concept
(	O
MDM	O
)	O
allows	O
an	O
organization	O
to	O
discover	O
and	O
define	O
non-transactional	O
lists	O
of	O
data	O
,	O
and	O
compile	O
maintainable	O
,	O
reliable	O
master	O
lists	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
first	O
shipped	O
with	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
2008	O
R2	O
.	O
</s>
<s>
Microsoft	B-Application
SQL	I-Application
Server	I-Application
2016	O
introduced	O
enhancements	O
to	O
Master	B-Application
Data	I-Application
Services	I-Application
,	O
such	O
as	O
improved	O
performance	O
and	O
security	O
,	O
and	O
the	O
ability	O
to	O
clear	O
transaction	O
logs	O
,	O
create	O
custom	O
indexes	O
,	O
share	O
entity	O
data	O
between	O
different	O
models	O
,	O
and	O
support	O
for	O
many-to-many	O
relationships	O
.	O
</s>
<s>
In	O
Master	B-Application
Data	I-Application
Services	I-Application
,	O
the	O
model	O
is	O
the	O
highest	O
level	O
container	O
in	O
the	O
structure	O
of	O
your	O
master	O
data	O
.	O
</s>
<s>
Like	O
other	O
MDM	O
products	O
,	O
Master	B-Application
Data	I-Application
Services	I-Application
aims	O
to	O
create	O
a	O
centralized	O
data	O
source	O
and	O
keep	O
it	O
synchronized	O
,	O
and	O
thus	O
reduce	O
redundancies	O
,	O
across	O
the	O
applications	O
which	O
process	O
the	O
data	O
.	O
</s>
<s>
Sharing	O
the	O
architectural	O
core	O
with	O
Stratature	B-Application
+EDM	O
,	O
Master	B-Application
Data	I-Application
Services	I-Application
uses	O
a	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
database	O
as	O
the	O
physical	O
data	O
store	O
.	O
</s>
<s>
The	O
entity	O
schemas	O
,	O
attributes	O
,	O
data	O
hierarchies	O
,	O
validation	O
rules	O
and	O
access	O
control	O
information	O
are	O
specified	O
as	O
metadata	O
to	O
the	O
Master	B-Application
Data	I-Application
Services	I-Application
runtime	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
does	O
not	O
impose	O
any	O
limitation	O
on	O
the	O
data	O
model	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
also	O
allows	O
custom	O
Business	O
rules	O
,	O
used	O
for	O
validating	O
and	O
sanitizing	O
the	O
data	O
entering	O
the	O
data	O
hub	O
,	O
to	O
be	O
defined	O
,	O
which	O
is	O
then	O
run	O
against	O
the	O
data	O
matching	O
the	O
specified	O
criteria	O
.	O
</s>
<s>
All	O
the	O
data	O
entities	O
can	O
be	O
versioned	B-Architecture
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
allows	O
the	O
master	O
data	O
to	O
be	O
categorized	O
by	O
hierarchical	O
relationships	O
,	O
such	O
as	O
employee	O
data	O
are	O
a	O
subtype	O
of	O
organization	O
data	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
can	O
also	O
expose	O
the	O
data	O
as	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
views	B-Language
,	O
which	O
can	O
be	O
pulled	O
by	O
any	O
SQL-compatible	O
client	O
.	O
</s>
<s>
The	O
views	B-Language
are	O
generated	O
dynamically	O
,	O
so	O
they	O
contain	O
the	O
latest	O
data	O
entities	O
in	O
the	O
master	O
hub	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
also	O
includes	O
a	O
web-based	O
UI	O
for	O
viewing	O
and	O
managing	O
the	O
data	O
.	O
</s>
<s>
It	O
uses	O
ASP.NET	B-Application
in	O
the	O
back-end	O
.	O
</s>
<s>
The	O
Silverlight	O
front-end	O
was	O
replaced	O
with	O
HTML5	O
in	O
SQL	B-Language
Server	O
2019	O
.	O
</s>
<s>
Master	B-Application
Data	I-Application
Services	I-Application
provides	O
a	O
Web	O
service	O
interface	O
to	O
expose	O
the	O
data	O
,	O
as	O
well	O
as	O
an	O
API	B-General_Concept
,	O
which	O
internally	O
uses	O
the	O
exposed	O
web	O
services	O
,	O
exposing	O
the	O
feature	O
set	O
,	O
programmatically	O
,	O
to	O
access	O
and	O
manipulate	O
the	O
data	O
.	O
</s>
<s>
It	O
also	O
integrates	O
with	O
Active	B-Protocol
Directory	I-Protocol
for	O
authentication	O
purposes	O
.	O
</s>
<s>
Unlike	O
+EDM	O
,	O
Master	B-Application
Data	I-Application
Services	I-Application
supports	O
Unicode	O
characters	O
,	O
as	O
well	O
as	O
support	O
multilingual	O
user	O
interfaces	O
.	O
</s>
<s>
SQL	B-Language
Server	O
2016	O
introduced	O
a	O
significant	O
performance	O
increase	O
in	O
Master	B-Application
Data	I-Application
Services	I-Application
over	O
previous	O
versions	O
.	O
</s>
<s>
This	O
is	O
very	O
similar	O
to	O
a	O
database	B-Language
view	I-Language
.	O
</s>
