<s>
Gregorio	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
scorewriter	B-Application
computer	B-Application
program	I-Application
especially	O
for	O
Gregorian	O
chant	O
in	O
square	O
notation	O
.	O
</s>
<s>
Gregorio	B-Application
was	O
adopted	O
by	O
many	O
Abbeys	O
and	O
large	O
projects	O
,	O
the	O
most	O
prominent	O
user	O
is	O
maybe	O
the	O
St.	O
Peter	O
's	O
Abbey	O
of	O
Solesmes	O
.	O
</s>
<s>
Gregorio	B-Application
is	O
not	O
a	O
completely	O
independent	O
program	O
,	O
but	O
consists	O
mainly	O
of	O
three	O
components	O
:	O
The	O
gabc	O
syntax	O
for	O
writing	O
Gregorian	O
scores	O
,	O
a	O
TeX	B-Application
package	O
named	O
GregorioTeX	O
,	O
which	O
is	O
responsible	O
for	O
the	O
graphical	O
output	O
and	O
a	O
converter	O
tool	O
between	O
those	O
two	O
.	O
</s>
<s>
As	O
such	O
,	O
Gregorio	B-Application
is	O
included	O
in	O
TeX	B-General_Concept
Live	I-General_Concept
2016	O
.	O
</s>
<s>
Gregorio	B-Application
is	O
written	O
especially	O
for	O
Gregorian	O
chant	O
in	O
square	O
notation	O
and	O
does	O
not	O
cover	O
modern	O
European	O
musical	O
notation	O
.	O
</s>
<s>
Similar	O
to	O
LilyPond	B-Application
it	O
does	O
not	O
provide	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
It	O
follows	O
the	O
gabc-syntax	O
,	O
which	O
is	O
defined	O
by	O
the	O
Gregorio	B-Application
Project	O
for	O
this	O
purpose	O
.	O
</s>
<s>
The	O
gregorio	B-Application
command	O
line	O
tool	O
converts	O
this	O
gabc-file	O
to	O
a	O
GregorioTeX	O
file	O
,	O
which	O
has	O
to	O
be	O
included	O
in	O
a	O
common	O
TeX	B-Application
file	O
.	O
</s>
<s>
Such	O
a	O
file	O
is	O
necessary	O
for	O
a	O
graphical	O
output	O
,	O
e.g.	O
,	O
in	O
the	O
PDF-format	O
.	O
</s>
<s>
The	O
Gregorio	B-Application
project	O
started	O
in	O
2006	O
at	O
TELECOM	O
Bretagne	O
,	O
a	O
graduate	O
engineering	O
school	O
in	O
France	O
.	O
</s>
<s>
When	O
the	O
project	O
was	O
done	O
,	O
Élie	O
Roux	O
decided	O
to	O
continue	O
the	O
project	O
on	O
his	O
own	O
and	O
to	O
develop	O
it	O
under	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
At	O
first	O
,	O
the	O
goal	O
of	O
the	O
project	O
was	O
just	O
to	O
provide	O
the	O
Benedictine	O
Abbey	O
Sainte	O
Madeleine	O
in	O
Le	O
Barroux	O
a	O
graphical	B-Application
interface	I-Application
for	O
the	O
usage	O
of	O
a	O
Gregorian	O
font	O
.	O
</s>
<s>
OpusTeX	O
was	O
a	O
LaTeX	O
package	O
with	O
a	O
similar	O
goal	O
like	O
Gregorio	B-Application
but	O
is	O
now	O
unmaintained	O
and	O
deprecated	O
.	O
</s>
<s>
During	O
a	O
three-month	O
internship	O
,	O
starting	O
in	O
April	O
2008	O
,	O
at	O
the	O
Monastero	O
di	O
San	O
Benedetto	O
,	O
in	O
Norcia	O
(	O
Italy	O
)	O
,	O
Gregorio	B-Application
made	O
considerable	O
progress	O
and	O
its	O
own	O
output	O
named	O
GregorioTeX	O
started	O
to	O
be	O
usable	O
.	O
</s>
<s>
In	O
following	O
years	O
Gregorio	B-Application
gained	O
stability	O
and	O
popularity	O
,	O
strongly	O
supported	O
by	O
the	O
migration	O
to	O
GitHub	B-Application
in	O
June	O
2014	O
.	O
</s>
<s>
Gregorio	B-Application
was	O
adopted	O
by	O
many	O
abbeys	O
and	O
large	O
projects	O
.	O
</s>
<s>
In	O
2016	O
Gregorio	B-Application
should	O
be	O
integrated	O
into	O
TeX	B-General_Concept
Live	I-General_Concept
,	O
which	O
would	O
make	O
the	O
installation	O
process	O
even	O
more	O
easy	O
.	O
</s>
<s>
For	O
producing	O
a	O
score	O
in	O
the	O
PDF	B-Application
format	I-Application
it	O
is	O
suitable	O
to	O
use	O
two	O
separate	O
files	O
—	O
one	O
gabc	O
file	O
and	O
one	O
TeX	B-Application
file	O
.	O
</s>
<s>
The	O
TeX	B-Application
file	O
could	O
look	O
like	O
this	O
(	O
with	O
the	O
gabc-file	O
named	O
"	O
kyrie.gabc	O
"	O
in	O
the	O
same	O
directory	O
)	O
:	O
</s>
<s>
Sung	O
text	O
and	O
notes	O
are	O
not	O
,	O
as	O
in	O
Lilypond	B-Application
syntax	O
,	O
separated	O
,	O
but	O
the	O
notes	O
are	O
written	O
in	O
parentheses	O
right	O
after	O
the	O
corresponding	O
syllable	O
.	O
</s>
<s>
If	O
both	O
the	O
TeX	B-Application
and	O
the	O
gabc	O
file	O
are	O
in	O
the	O
same	O
directory	O
,	O
one	O
has	O
just	O
to	O
compile	O
the	O
tex-file	O
with	O
lualatex	O
--shell-escape	O
kyrie.tex	O
.	O
</s>
<s>
Gregorio	B-Application
is	O
the	O
leading	O
program	O
on	O
its	O
area	O
and	O
widely	O
used	O
.	O
</s>
<s>
The	O
Church	O
Music	O
Association	O
of	O
America	O
offered	O
introductions	O
to	O
Gregorio	B-Application
on	O
their	O
annual	O
conference	O
.	O
</s>
<s>
Gregorio	B-Application
was	O
compared	O
in	O
a	O
scientific	O
article	O
in	O
2014	O
.	O
</s>
<s>
Other	O
projects	O
build	O
and	O
extend	O
on	O
Gregorio	B-Application
,	O
for	O
instance	O
to	O
make	O
the	O
usage	O
more	O
user	O
friendly	O
:	O
</s>
