<s>
Tag	B-Language
omission	I-Language
is	O
an	O
optional	O
feature	O
to	O
minimize	O
an	O
SGML	B-Language
document	O
.	O
</s>
<s>
The	O
tag	B-Language
omission	I-Language
feature	O
can	O
be	O
generally	O
enabled	O
or	O
disabled	O
in	O
the	O
SGML	B-Language
Declaration	O
.	O
</s>
<s>
The	O
Document	B-Language
Type	I-Language
Definition	I-Language
is	O
used	O
to	O
enable	O
or	O
disable	O
the	O
tag	O
for	O
a	O
specific	O
tag	O
.	O
</s>
<s>
Tag	B-Language
omission	I-Language
is	O
one	O
of	O
the	O
main	O
features	O
of	O
SGML	B-Language
which	O
was	O
removed	O
from	O
XML	B-Protocol
to	O
simplify	O
parsing	O
.	O
</s>
<s>
In	O
this	O
DTD	O
specification	O
,	O
the	O
behavior	O
of	O
the	O
tag	B-Language
omission	I-Language
feature	O
is	O
specified	O
for	O
each	O
element	O
by	O
the	O
two	O
characters	O
following	O
the	O
element	O
name	O
.	O
</s>
<s>
A	O
valid	O
document	O
not	O
using	O
tag	B-Language
omission	I-Language
:	O
</s>
<s>
A	O
valid	O
document	O
simplified	O
by	O
using	O
tag	B-Language
omission	I-Language
:	O
</s>
