<s>
UI	B-General_Concept
data	I-General_Concept
binding	I-General_Concept
is	O
a	O
software	O
design	O
pattern	O
to	O
simplify	O
development	O
of	O
GUI	B-Application
applications	O
.	O
</s>
<s>
UI	B-General_Concept
data	I-General_Concept
binding	I-General_Concept
binds	O
UI	O
elements	O
to	O
an	O
application	O
domain	B-Application
model	I-Application
.	O
</s>
<s>
Most	O
frameworks	O
employ	O
the	O
Observer	B-Language
pattern	I-Language
as	O
the	O
underlying	O
binding	O
mechanism	O
.	O
</s>
<s>
To	O
work	O
efficiently	O
,	O
UI	B-General_Concept
data	I-General_Concept
binding	I-General_Concept
has	O
to	O
address	O
input	O
validation	O
and	O
data	O
type	O
mapping	O
.	O
</s>
<s>
A	O
bound	B-General_Concept
control	I-General_Concept
is	O
a	O
widget	O
whose	O
value	O
is	O
tied	O
or	O
bound	B-General_Concept
to	O
a	O
field	O
in	O
a	O
recordset	B-Application
(	O
e.g.	O
,	O
a	O
column	B-Application
in	O
a	O
row	B-Application
of	O
a	O
table	B-Application
)	O
.	O
</s>
