There is a new DSM 2.0, but where are the tech specs?

Dear SDN Community,
After the upgrade of one of our Portal systems from SP15 to SP17 we see that there is an additional configuration item in the System Objects availible.
The new property it technical ID is: wap.ITS.SAP_Session_Management
The description of this new property is:
If set to 'Yes', the SAP GUI for HTML application is started with parameter 'sap-sessmgt-version=2.0'. If set to 'No' the parameter 'sap-sessmgt-version' is omitted and the SAP GUI for HTML works with the deafult Session Management (SISP 1.1).
Now I already found the following notes...
Note 1235237 - WebGui Transaction iViews (ITS) support DSM 2.0
  https://service.sap.com/sap/support/notes/1235237
Note 1233321 - ITS support DSM protocol 2.0
  https://service.sap.com/sap/support/notes/1233321
...but they do not give me an answer on: "whats new", "why its better" etc etc.
Can someone provide me this info? or a link to it?
Thanks in advance!
Benjamin Houttuin

Dear SDN Community,
Because I realy wanted to know the anwer I raised a (low-prio) message at OSS for it.
Today I got an answer:
17.09.2009 - 08:11:02 CET - Reply by SAP     
Dear Customer
After discussing your query with one of an expert following is the
answer to your query :
The major new features with SISP 2.0 are support for Suspend/Resume
notification and performance optimization in the navigation. Basically,
SISP 2.0 allows to differentiate between a navigation away and a browserclose (in SISP 1.1, both cases are signalled by a USR_ABORT command,
whereas in SISP 2.0, the navigation away is signalled by a USR_SUSPEND
command, this command is new to SISP 2.0). In other words, the SRA now
distinguishes between suspend of the application via a navigation away,
with the likelihood that the application will be resumed, and
termination of the application via a browser close. Comparing to SISP
1.1, the SISP 2.0 therefore provides finer granularity, so the content
server then can decide whether to perform a 'suspend' of the application(where the data are kept ready for resume later) or release the session.In addition, when re-launching the same application (for example by
clicking on the same navigation node twice), the portal SRA will
recognize this case for a SISP 2.0 object and omit the USR_SUSPEND
notification for performance reasons (otherwise the content server wouldhave to terminate the existing session and create the new one a few
milliseconds later).
Regards
Priyanka
SAP Active Global Support
Very clear answer I would say... so we are going to use it
Cheers,
Benjamin Houttuin

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