<s>
Hypertext	B-Protocol
Application	I-Protocol
Language	I-Protocol
(	O
HAL	O
)	O
is	O
an	O
Internet	O
Draft	O
(	O
a	O
"	O
work	O
in	O
progress	O
"	O
)	O
standard	O
convention	O
for	O
defining	O
hypermedia	O
such	O
as	O
links	O
to	O
external	O
resources	O
within	O
JSON	B-General_Concept
or	O
XML	B-Protocol
code	O
(	O
however	O
,	O
the	O
latest	O
version	O
of	O
HAL	O
Internet-Draft	O
expired	O
on	O
November	O
12	O
,	O
2016	O
.	O
)	O
.	O
</s>
<s>
The	O
standard	O
was	O
initially	O
proposed	O
in	O
June	O
2012	O
specifically	O
for	O
use	O
with	O
JSON	B-General_Concept
and	O
has	O
since	O
become	O
available	O
in	O
two	O
variations	O
,	O
JSON	B-General_Concept
and	O
XML	B-Protocol
.	O
</s>
<s>
The	O
two	O
associated	O
MIME	B-Protocol
types	O
are	O
media	O
type	O
:	O
application/hal	O
+xml	O
and	O
media	O
type	O
:	O
application/hal	O
+json	O
.	O
</s>
<s>
HAL	O
was	O
created	O
to	O
be	O
simple	O
to	O
use	O
and	O
easily	O
applicable	O
across	O
different	O
domains	B-General_Concept
by	O
avoiding	O
the	O
need	O
to	O
impose	O
any	O
requirements	O
on	O
how	O
the	O
project	O
be	O
structured	O
.	O
</s>
<s>
Maintaining	O
this	O
minimal	O
impact	O
approach	O
,	O
HAL	O
has	O
enabled	O
developers	O
to	O
create	O
general-purpose	O
libraries	B-Library
which	O
can	O
be	O
easily	O
incorporated	O
on	O
any	O
API	B-Application
that	O
uses	O
HAL	O
.	O
</s>
<s>
APIs	B-Application
that	O
adopt	O
HAL	O
simplify	O
the	O
use	O
of	O
open	B-Application
source	I-Application
libraries	B-Library
and	O
make	O
it	O
possible	O
to	O
interact	O
with	O
the	O
API	B-Application
using	O
JSON	B-General_Concept
or	O
XML	B-Protocol
.	O
</s>
<s>
Resources	O
consist	O
of	O
URI	B-Protocol
links	O
,	O
embedded	O
resources	O
,	O
your	O
standard	O
data	O
(	O
be	O
it	O
JSON	B-General_Concept
or	O
XML	B-Protocol
)	O
,	O
and	O
non	O
URI	B-Protocol
links	O
.	O
</s>
<s>
Links	O
have	O
a	O
target	O
URI	B-Protocol
,	O
as	O
well	O
as	O
the	O
name	O
of	O
the	O
link	O
(	O
referred	O
to	O
as	O
'	O
rel	O
 '	O
)	O
,	O
as	O
well	O
as	O
optional	O
properties	O
designed	O
to	O
be	O
mindful	O
of	O
deprecation	O
and	O
content	O
negotiation	O
.	O
</s>
