<s>
OMDoc	B-Language
(	O
Open	O
Mathematical	O
Documents	O
)	O
is	O
a	O
semantic	B-Application
markup	O
format	O
for	O
mathematical	O
documents	O
.	O
</s>
<s>
While	O
MathML	B-Language
only	O
covers	O
mathematical	O
formulae	O
and	O
the	O
related	O
OpenMath	B-Language
standard	O
only	O
supports	O
formulae	O
and	O
“	O
content	O
dictionaries	O
”	O
containing	O
definitions	O
of	O
the	O
symbols	O
used	O
in	O
formulae	O
,	O
OMDoc	B-Language
covers	O
the	O
whole	O
range	O
of	O
written	O
mathematics	O
.	O
</s>
<s>
OMDoc	B-Language
allows	O
for	O
mathematical	O
expressions	O
on	O
three	O
levels	O
:	O
</s>
<s>
Object	O
levelFormulae	O
,	O
written	O
in	O
Content	O
MathML	B-Language
(	O
the	O
non-presentational	O
subset	O
of	O
MathML	B-Language
)	O
,	O
OpenMath	B-Language
or	O
languages	O
for	O
mathematical	O
logic	O
.	O
</s>
<s>
Theories	O
may	O
import	O
each	O
other	O
,	O
thereby	O
forming	O
a	O
graph	B-Application
.	O
</s>
<s>
Seen	O
as	O
collections	O
of	O
symbol	O
definitions	O
,	O
OMDoc	B-Language
theories	O
are	O
compatible	O
to	O
OpenMath	B-Language
content	O
dictionaries	O
.	O
</s>
<s>
OMDoc	B-Language
is	O
a	O
semantic	B-Application
markup	O
language	O
that	O
allows	O
writing	O
down	O
the	O
meaning	O
of	O
texts	O
about	O
mathematics	O
.	O
</s>
<s>
In	O
contrast	O
to	O
LaTeX	B-Application
,	O
for	O
example	O
,	O
it	O
is	O
not	O
primarily	O
presentation-oriented	O
.	O
</s>
<s>
An	O
OMDoc	B-Language
document	O
need	O
not	O
specify	O
what	O
its	O
contents	O
should	O
look	O
like	O
.	O
</s>
<s>
A	O
conversion	O
to	O
LaTeX	B-Application
and	O
XHTML	B-Language
(	O
with	O
Presentation	O
MathML	B-Language
for	O
the	O
formulae	O
)	O
is	O
possible	O
,	O
though	O
.	O
</s>
<s>
Today	O
,	O
OMDoc	B-Language
is	O
used	O
in	O
the	O
following	O
settings	O
:	O
</s>
<s>
Data	O
exchangeOMDoc	O
import	O
and	O
export	O
modules	O
are	O
available	O
for	O
many	O
automated	B-Application
theorem	I-Application
provers	I-Application
and	O
computer	B-General_Concept
algebra	I-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
OMDoc	B-Language
is	O
intended	O
to	O
be	O
used	O
for	O
communication	O
between	O
mathematical	O
web	O
services	O
.	O
</s>
<s>
Document	O
preparationDocuments	O
about	O
mathematics	O
can	O
be	O
prepared	O
in	O
OMDoc	B-Language
and	O
later	O
exported	O
to	O
a	O
presentation-oriented	O
format	O
like	O
LaTeX	B-Application
or	O
XHTML+MathML	O
.	O
</s>
<s>
OMDoc	B-Language
has	O
been	O
developed	O
by	O
the	O
German	O
mathematician	O
and	O
computer	O
scientist	O
Michael	O
Kohlhase	O
since	O
1998	O
.	O
</s>
<s>
It	O
is	O
planned	O
to	O
create	O
the	O
infrastructure	O
for	O
a	O
“	O
semantic	B-Application
web	O
for	O
technology	O
and	O
science	O
”	O
based	O
on	O
OMDoc	B-Language
.	O
</s>
<s>
To	O
this	O
end	O
,	O
OMDoc	B-Language
is	O
being	O
extended	O
towards	O
sciences	O
other	O
than	O
mathematics	O
.	O
</s>
<s>
The	O
first	O
result	O
is	O
PhysML	O
,	O
an	O
OMDoc	B-Language
variant	O
extended	O
towards	O
physics	O
.	O
</s>
<s>
For	O
a	O
better	O
integration	O
with	O
other	O
Semantic	B-Application
Web	O
applications	O
,	O
an	O
OWL	B-Language
ontology	I-Language
of	O
OMDoc	B-Language
is	O
under	O
development	O
,	O
as	O
well	O
as	O
an	O
export	O
facility	O
to	O
RDF	O
.	O
</s>
