<s>
The	O
W3C	O
's	O
XML	B-Protocol
Schema	O
Recommendation	O
defines	O
a	O
formal	O
mechanism	O
for	O
describing	O
XML	B-Protocol
documents	I-Protocol
.	O
</s>
<s>
The	O
standard	O
has	O
become	O
popular	O
and	O
is	O
used	O
by	O
the	O
majority	O
of	O
standards	B-Language
bodies	I-Language
when	O
describing	O
their	O
data	O
.	O
</s>
<s>
Although	O
any	O
text-based	O
editor	O
can	O
be	O
used	O
to	O
edit	O
an	O
XML	B-Protocol
Schema	O
,	O
a	O
graphical	O
editor	O
offers	O
advantages	O
;	O
allowing	O
the	O
structure	O
of	O
the	O
document	O
to	O
be	O
viewed	O
graphically	O
and	O
edited	O
with	O
validation	O
support	O
,	O
entry	O
helpers	O
and	O
other	O
useful	O
features	O
.	O
</s>
<s>
The	O
text	O
view	O
of	O
an	O
XML	B-Protocol
Schema	O
shows	O
the	O
schema	O
in	O
its	O
native	O
form	O
.	O
</s>
<s>
XML	B-Language
Schema	I-Language
Editors	I-Language
generally	O
add	O
to	O
the	O
text	O
view	O
with	O
features	O
including	O
inline	O
entry	O
helpers	O
and	O
entry	O
helper	O
windows	O
,	O
code	O
completion	O
,	O
line	O
numbering	O
,	O
source	O
folding	O
,	O
and	O
syntax	O
coloring	O
.	O
</s>
<s>
A	O
physical	O
view	O
of	O
an	O
XML	B-Protocol
Schema	O
displays	O
a	O
graphical	O
entity	O
for	O
each	O
element	O
within	O
the	O
XML	B-Protocol
Schema	O
.	O
</s>
<s>
A	O
logical	O
view	O
shows	O
the	O
structure	O
of	O
the	O
XML	B-Protocol
Schema	O
without	O
showing	O
all	O
the	O
detail	O
of	O
the	O
syntax	O
used	O
to	O
describe	O
it	O
.	O
</s>
<s>
This	O
provides	O
a	O
clearer	O
view	O
of	O
the	O
XML	B-Protocol
Schema	O
,	O
making	O
it	O
easier	O
to	O
understand	O
the	O
structure	O
of	O
the	O
document	O
,	O
and	O
makes	O
it	O
easier	O
to	O
edit	O
.	O
</s>
<s>
Physical	O
View	O
Logical	O
ViewA	O
diagrammatic	O
representation	O
of	O
an	O
XML	B-Protocol
Schema	O
,	O
each	O
element	O
and	O
attribute	O
in	O
the	O
source	O
code	O
is	O
being	O
by	O
an	O
entity	O
in	O
the	O
diagram	O
.	O
</s>
<s>
A	O
diagrammatic	O
representation	O
of	O
an	O
XML	B-Protocol
Schema	O
(	O
XSD	O
)	O
,	O
each	O
entity	O
in	O
the	O
diagram	O
is	O
created	O
using	O
a	O
number	O
of	O
elements	O
and	O
attributes	O
to	O
produce	O
a	O
logical	O
view	O
of	O
the	O
schema	O
,	O
this	O
removes	O
unnecessary	O
implementation	O
detail	O
,	O
while	O
adding	O
data	O
resolved	O
from	O
elsewhere	O
in	O
the	O
source	O
code	O
.	O
</s>
<s>
As	O
the	O
XSD	O
standard	O
has	O
gained	O
support	O
,	O
a	O
host	O
of	O
XML	B-Language
Schema	I-Language
editors	I-Language
have	O
been	O
developed	O
.	O
</s>
<s>
See	O
this	O
Comparison	B-Application
of	I-Application
XML	I-Application
editors	I-Application
available	O
here	O
.	O
</s>
