Can you please provide the link? Thankyou.
In my knowledge of PDW, it for a start have to be light, compact.
The main objective of a PDW is for certain troops working in
confined environment who need a weapon that can provide a higher
volume of fire, further range and more penetration power than an
automatic pistol and if possible, more compact than a submachine
gun. A good example of a PDW is the P-90 which is used by snipers
(as a secondary weapon), tankees and pilots in foreign
service.
The SSW (squad support weapon) under my knowledge is not a personal
defence weapon as it is too large, bulky and heavy to be one. It is
a support weapon belonging to the class of the old M-16/M-203 combi
and the OCIW. Perhaps the SSW can fire the special 5.7mm round that
the P90 PDW can fire but the SSW is still a SSW not a PDW.
For more visual reference of a PDW, please refer to the MP5K-PDW
and the G-11 PDW.