<s>
WebML	B-Language
(	O
Web	O
Modeling	O
Language	O
)	O
is	O
a	O
visual	O
notation	O
and	O
a	O
methodology	O
for	O
designing	O
complex	O
data-intensive	O
Web	B-Application
applications	I-Application
.	O
</s>
<s>
In	O
2013	O
WebML	B-Language
has	O
been	O
extended	O
to	O
cover	O
a	O
wider	O
spectrum	O
of	O
front-end	O
interfaces	O
,	O
thus	O
resulting	O
in	O
the	O
Interaction	O
Flow	O
Modeling	O
Language	O
(	O
IFML	O
)	O
,	O
adopted	O
as	O
a	O
standard	O
by	O
the	O
Object	B-Architecture
Management	I-Architecture
Group	I-Architecture
(	O
OMG	O
)	O
.	O
</s>
<s>
WebML	B-Language
enables	O
designers	O
to	O
express	O
the	O
core	O
features	O
of	O
a	O
site	O
at	O
a	O
high	O
level	O
without	O
committing	O
to	O
detailed	O
architectural	O
details	O
.	O
</s>
<s>
WebML	B-Language
concepts	O
are	O
associated	O
with	O
an	O
intuitive	O
graphic	O
representation	O
,	O
which	O
can	O
be	O
easily	O
supported	O
by	O
CASE	O
tools	O
and	O
effectively	O
communicated	O
to	O
the	O
non-technical	O
members	O
of	O
the	O
site	O
development	O
team	O
(	O
e.g.	O
,	O
with	O
the	O
graphic	O
designers	O
and	O
the	O
content	O
producers	O
)	O
.	O
</s>
<s>
WebML	B-Language
also	O
supports	O
an	O
XML	O
syntax	O
,	O
which	O
instead	O
can	O
be	O
fed	O
to	O
software	O
generators	O
for	O
automatically	O
producing	O
the	O
implementation	O
of	O
a	O
Web	O
site	O
.	O
</s>
<s>
The	O
specification	O
of	O
a	O
site	O
in	O
WebML	B-Language
consists	O
of	O
four	O
orthogonal	O
perspectives	O
:	O
</s>
<s>
WebML	B-Language
does	O
not	O
propose	O
yet	O
another	O
language	O
for	O
data	O
modeling	O
,	O
but	O
is	O
compatible	O
with	O
classical	O
notations	O
like	O
the	O
E/R	O
model	O
,	O
the	O
ODMG	O
object-oriented	O
model	O
,	O
and	O
UML	O
class	O
diagrams	O
.	O
</s>
<s>
A	O
typical	O
design	O
process	O
using	O
WebML	B-Language
proceeds	O
by	O
iterating	O
the	O
following	O
steps	O
for	O
each	O
design	O
cycle	O
:	O
</s>
<s>
The	O
Web	B-Application
application	I-Application
architect	O
defines	O
the	O
structure	O
"	O
in	O
the	O
large	O
"	O
of	O
the	O
hypertext	O
,	O
by	O
identifying	O
pages	O
and	O
units	O
,	O
linking	O
them	O
,	O
and	O
mapping	O
units	O
to	O
the	O
main	O
entities	O
and	O
relationships	O
of	O
the	O
structure	O
schema	O
.	O
</s>
<s>
The	O
Web	B-Application
application	I-Application
architect	O
concentrates	O
next	O
in	O
the	O
design	O
"	O
in	O
the	O
small	O
"	O
of	O
the	O
hypertext	O
,	O
by	O
considering	O
each	O
page	O
and	O
unit	O
individually	O
.	O
</s>
<s>
Potential	O
users	O
and	O
user	O
groups	O
are	O
mapped	O
to	O
WebML	B-Language
users	O
and	O
groups	O
,	O
and	O
possibly	O
a	O
different	O
site	O
view	O
is	O
created	O
for	O
each	O
group	O
.	O
</s>
<s>
The	O
fundamental	O
elements	O
of	O
WebML	B-Language
structure	O
model	O
are	O
entities	O
,	O
which	O
are	O
containers	O
of	O
data	O
elements	O
,	O
and	O
relationships	O
,	O
which	O
enable	O
the	O
semantic	O
connection	O
of	O
entities	O
.	O
</s>
<s>
In	O
a	O
concrete	O
setting	O
,	O
e.g.	O
,	O
an	O
HTML	O
or	O
WML	O
implementation	O
of	O
a	O
WebML	B-Language
site	O
,	O
pages	O
and	O
units	O
are	O
mapped	O
to	O
suitable	O
constructs	O
in	O
the	O
delivery	O
language	O
,	O
e.g.	O
,	O
units	O
may	O
map	O
to	O
HTML	O
files	O
and	O
pages	O
to	O
HTML	O
frames	O
organizing	O
such	O
files	O
on	O
the	O
screen	O
.	O
</s>
<s>
WebML	B-Language
supports	O
six	O
types	O
of	O
unit	O
to	O
compose	O
an	O
hypertext	O
:	O
</s>
<s>
To	O
this	O
purpose	O
,	O
WebML	B-Language
provides	O
the	O
notion	O
of	O
link	O
.	O
</s>
<s>
In	O
WebML	B-Language
,	O
units	O
,	O
pages	O
,	O
their	O
presentation	O
styles	O
,	O
and	O
site	O
views	O
can	O
be	O
defined	O
so	O
to	O
take	O
user	O
-	O
or	O
group-specific	O
data	O
into	O
account	O
.	O
</s>
<s>
Procedural	O
personalization	O
:	O
WebML	B-Language
includes	O
an	O
XML	O
syntax	O
for	O
writing	O
business	O
rules	O
that	O
compute	O
and	O
store	O
user-specific	O
information	O
.	O
</s>
<s>
WebML	B-Language
pages	O
are	O
rendered	O
according	O
to	O
a	O
style	O
sheet	O
.	O
</s>
