<s>
The	O
open-source	O
Kmc-Subset137	B-General_Concept
Project	O
implements	O
the	O
protocol	O
described	O
in	O
"	O
ERTMS/ECTS	O
;	O
On-line	O
Key	O
Management	O
FFFIS	O
"	O
UNISIG	O
SUBSET-137	O
ver1.0.0	O
.	O
</s>
<s>
The	O
open	O
source	O
library	O
provides	O
a	O
simple	O
C	B-Language
language	I-Language
application	O
programming	O
interface	O
(	O
API	O
)	O
to	O
access	O
and	O
parse	O
UNISIG	O
SUBSET	O
137	O
messages	O
.	O
</s>
