<s>
Flow	O
(	O
formerly	O
known	O
as	O
TYPO3	B-Language
Flow	I-Language
or	O
FLOW3	B-Language
)	O
is	O
a	O
free	O
and	O
open	O
source	O
web	B-Application
application	I-Application
framework	I-Application
written	O
in	O
PHP	B-Application
.	O
</s>
<s>
It	O
was	O
primarily	O
designed	O
as	O
a	O
basis	O
for	O
the	O
content	O
management	O
system	O
Neos	B-Language
,	O
but	O
can	O
also	O
be	O
used	O
independently	O
.	O
</s>
<s>
It	O
is	O
generally	O
suitable	O
for	O
PHP	B-Application
development	O
of	O
mid	O
-	O
or	O
large-scaled	O
web	O
applications	O
.	O
</s>
<s>
In	O
2006	O
,	O
the	O
developers	O
of	O
the	O
content	O
management	O
system	O
TYPO3	B-Protocol
decided	O
to	O
rewrite	O
the	O
system	O
from	O
scratch	O
.	O
</s>
<s>
Flow	O
evolves	O
from	O
this	O
decision	O
as	O
a	O
discrete	O
and	O
stand-alone	O
Framework	O
that	O
can	O
be	O
used	O
independently	O
from	O
TYPO3	B-Protocol
.	O
</s>
<s>
At	O
the	O
keynote	O
of	O
the	O
international	O
TYPO3	B-Protocol
Conference	O
2011	O
(	O
T3CON11	O
)	O
in	O
Hanau	O
,	O
Germany	O
,	O
Robert	O
Lemke	O
,	O
Chief	O
Developer	O
of	O
the	O
coming	O
"	O
next	O
generation	O
"	O
Version	O
of	O
TYPO3	B-Protocol
,	O
announced	O
the	O
release	O
of	O
the	O
final	O
version	O
of	O
Flow	O
to	O
be	O
on	O
October	O
20	O
.	O
</s>
<s>
At	O
the	O
international	O
TYPO3	B-Protocol
Conference	O
2012	O
(	O
T3CON12	O
)	O
TYPO3	B-Protocol
was	O
announced	O
as	O
a	O
family	O
brand	O
.	O
</s>
<s>
Subsequently	O
all	O
product	O
names	O
from	O
the	O
TYPO3	B-Protocol
project	O
now	O
start	O
with	O
TYPO3	B-Protocol
,	O
and	O
as	O
"	O
TYPO3	B-Protocol
Flow3	B-Language
"	O
is	O
neither	O
easy	O
to	O
pronounce	O
nor	O
would	O
match	O
the	O
name	O
of	O
the	O
other	O
products	O
it	O
was	O
renamed	O
to	O
"	O
TYPO3	B-Language
Flow	I-Language
"	O
.	O
</s>
<s>
Later	O
on	O
,	O
as	O
NEOS	B-Language
and	O
TYPO3	B-Protocol
projects	O
went	O
different	O
ways	O
,	O
"	O
TYPO3	B-Language
Flow	I-Language
"	O
was	O
renamed	O
to	O
"	O
Flow	O
"	O
as	O
part	O
of	O
the	O
NEOS	B-Language
project	O
.	O
</s>
<s>
Neos	B-Language
Flow	I-Language
provides	O
the	O
base	O
of	O
the	O
Neos	B-Language
Content	O
Application	O
Platform	O
,	O
but	O
can	O
also	O
be	O
used	O
independently	O
,	O
i.e.	O
</s>
<s>
In	O
the	O
context	O
of	O
Flows	O
's	O
documentation	O
a	O
blogsystem	O
is	O
used	O
to	O
visualize	O
the	O
various	O
paradigms	O
of	O
Flow	O
like	O
MVC	O
(	O
Model-View-Controller	O
)	O
,	O
AOP	O
(	O
Aspect-Oriented-Programming	O
)	O
or	O
DDD	O
(	O
Domain-Driven-Design	O
)	O
.	O
</s>
<s>
The	O
system	O
uses	O
namespaces	O
and	O
therefore	O
depends	O
on	O
PHP	B-Application
5.3	O
+	O
.	O
</s>
<s>
The	O
developers	O
of	O
TYPO3	B-Language
Flow	I-Language
focused	O
on	O
a	O
series	O
of	O
paradigms	O
and	O
design	O
patterns	O
,	O
some	O
of	O
which	O
are	O
considered	O
as	O
innovative	O
within	O
the	O
PHP	B-Application
community	O
.	O
</s>
<s>
When	O
designing	O
TYPO3	B-Language
Flow	I-Language
the	O
developers	O
paid	O
attention	O
that	O
their	O
custom	O
code	O
has	O
minimal	O
dependencies	O
on	O
the	O
TYPO3	B-Language
Flow	I-Language
API	B-General_Concept
.	O
</s>
<s>
This	O
allows	O
users	O
to	O
import	O
and	O
use	O
modules	O
that	O
were	O
originally	O
written	O
for	O
other	O
systems	O
(	O
such	O
as	O
Symfony	B-Language
)	O
to	O
be	O
used	O
in	O
TYPO3	B-Language
Flow	I-Language
with	O
very	O
little	O
modifications	O
.	O
</s>
<s>
TYPO3	B-Language
Flow	I-Language
is	O
based	O
on	O
basic	O
,	O
transparent	O
concepts	O
to	O
make	O
working	O
with	O
it	O
as	O
simple	O
as	O
possible	O
.	O
</s>
<s>
Thus	O
,	O
the	O
user	O
can	O
,	O
for	O
example	O
,	O
display	O
customer	O
information	O
by	O
writing	O
only	O
three	O
or	O
four	O
lines	O
of	O
PHP	B-Application
source	O
code	O
a	O
Fluid	O
template	O
with	O
HTML	O
code	O
.	O
</s>
<s>
On	O
2	O
June	O
2009	O
the	O
first	O
Build	O
was	O
released	O
as	O
FLOW3	B-Language
1.0.0	O
Alpha	O
1	O
In	O
the	O
following	O
period	O
about	O
14	O
alpha	O
versions	O
were	O
released	O
,	O
until	O
FLOW3	B-Language
was	O
ready	O
for	O
the	O
beta	O
phase	O
in	O
August	O
2011	O
.	O
</s>
<s>
In	O
this	O
early	O
development	O
stage	O
,	O
the	O
API	B-General_Concept
has	O
not	O
changed	O
,	O
to	O
guarantee	O
backward	B-General_Concept
compatibility	I-General_Concept
.	O
</s>
<s>
The	O
TYPO3	B-Language
Flow	I-Language
core	O
team	O
currently	O
consists	O
of	O
eleven	O
developers	O
actively	O
working	O
on	O
the	O
framework	O
.	O
</s>
<s>
After	O
5	O
years	O
of	O
development	O
,	O
the	O
framework	O
FLOW3	B-Language
1.0	O
.	O
is	O
released	O
,	O
to	O
serve	O
as	O
the	O
foundation	O
for	O
the	O
new	O
product	O
,	O
codename	O
"	O
TYPO3	B-Protocol
Phoenix	O
"	O
,	O
release	O
notes	O
for	O
FLOW3	B-Language
1.0	O
rec	O
.	O
</s>
<s>
11	O
October	O
2011	O
finally	O
named	O
TYPO3	B-Language
Neos	I-Language
.	O
</s>
<s>
TYPO3	B-Language
Flow	I-Language
was	O
initiated	O
by	O
the	O
TYPO3	B-Protocol
community	O
and	O
is	O
mainly	O
developed	O
by	O
the	O
TYPO3	B-Protocol
core	O
team	O
.	O
</s>
<s>
The	O
primary	O
goal	O
is	O
to	O
create	O
a	O
basis	O
for	O
the	O
upcoming	O
CMS	O
TYPO3	B-Language
Neos	I-Language
.	O
</s>
<s>
The	O
development	O
and	O
publication	O
is	O
-	O
like	O
all	O
TYPO3	B-Protocol
subprojects	O
-	O
funded	O
by	O
the	O
TYPO3	B-Protocol
Association	O
.	O
</s>
<s>
Most	O
of	O
the	O
new	O
features	O
of	O
TYPO3	B-Language
Flow	I-Language
have	O
been	O
backported	O
for	O
use	O
with	O
older	O
TYPO3	B-Protocol
versions	O
(	O
4.3	O
and	O
higher	O
)	O
to	O
provide	O
a	O
smooth	O
transition	O
to	O
or	O
from	O
TYPO3	B-Protocol
CMS	I-Protocol
.	O
</s>
<s>
Therefore	O
,	O
Domain-Driven	O
Design	O
and	O
MVC	O
concepts	O
can	O
be	O
used	O
within	O
TYPO3	B-Protocol
CMS	I-Protocol
and	O
subsequently	O
ported	O
to	O
systems	O
running	O
TYPO3	B-Language
Neos	I-Language
.	O
</s>
<s>
Another	O
outcome	O
of	O
this	O
is	O
the	O
renaming	O
from	O
FLOW3	B-Language
to	O
TYPO3	B-Language
Flow	I-Language
,	O
which	O
was	O
decided	O
by	O
the	O
TYPO3	B-Protocol
association	O
in	O
2012	O
.	O
</s>
<s>
TYPO3	B-Language
Flow	I-Language
has	O
its	O
own	O
template	B-Application
engine	I-Application
called	O
Fluid	O
.	O
</s>
<s>
Though	O
there	O
already	O
were	O
numerous	O
templating	B-Application
engines	I-Application
,	O
none	O
of	O
them	O
did	O
satisfy	O
the	O
requirements	O
of	O
the	O
developers	O
.	O
</s>
<s>
blogPosts	O
is	O
a	O
PHP	B-Application
array	O
,	O
which	O
is	O
passed	O
to	O
fluid	O
from	O
external	O
PHP	B-Application
code	O
(	O
the	O
ViewHelper	O
)	O
.	O
</s>
<s>
The	O
template	O
iterates	B-Algorithm
over	O
this	O
array	O
and	O
prints	O
the	O
title	O
of	O
each	O
post	O
object	O
.	O
</s>
