RE: Client Side Session management

I am relatively new to the X-Form forum, but here is my doubt on this
approach - How much 'trust' could you show in the data client side data
'without' being validated/manipulated/massaged by the server? The general
web development guidelines for security dictate that each element be
revalidated on the server side, and most of the times the data (such as
derived data) is computed on the server. 

To take a similar situation on the client-server side, applications are
required to refresh their client data once a server-bound transaction is
completed. This ensures the currency and integrity of the data. 

I realize that there are performance benefits in retaining data on the
client side, but would that not be more on a case-by-case basis? I believe
that once you complete a database bound transaction, most of the times you
will be required to discard the current client data and refresh it from the
backend. Plus, maintaining high volume of data on the client side and
'depending' upon it would call for some significant assumptions on client
resources , something that could be risky for a web application running on
diverse platforms. 

Regards,
Milind. 

-----Original Message-----
From: Thompson, Bryan B. [mailto:BRYAN.B.THOMPSON@saic.com] 
Sent: Tuesday, June 22, 2004 5:34 AM
To: Dharmesh Mistry; www-forms@w3.org
Subject: RE: Client Side Session management


Yes.

An XForms client can hold multiple XML trees as instance data.  It is my
understanding that
these data either survive a submission (and so are held by the client), or
that at most one
XML instance data section is replaced after a successful submission (the one
whose data was
submitted), or that the entire page is replaced (normal HTML Forms-based
navigation).  The
first and second of these cases are responsive to your request.  They
behavior is controlled
by the "replace" attribute on the "submission" element.

-bryan

-----Original Message-----
From: www-forms-request@w3.org [mailto:www-forms-request@w3.org] On Behalf
Of Dharmesh Mistry
Sent: Tuesday, June 22, 2004 4:12 AM
To: www-forms@w3.org
Subject: Client Side Session management



We have been deploying web applications for a number of years now. Where
possible we have adopted standards, how for transactional web based
applications we have had to question the standard "CGI" model.

One thing we think that would be of massive benefit is client side session
data (more than just cookies) support. Such that data can be held in the
memory of the client. This would enable not having to write code to
repopulate forms. Also would overcome the constant issue of Browser back
buttons picking up cached forms (which then have to be expired so the server
can represent the data).

Is this issue being addressed by XForms / W3C ?



Dharmesh Mistry
Chief Operating and Technology Officer, edge IPK
E dharmesh@edgeIPK.com
M +44 (0)  7789 222 015

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----- Original Message ----- 
From: "Jason Harrop" <jharrop@speedlegal.com>
To: <www-forms@w3.org>
Sent: Tuesday, June 22, 2004 2:36 AM
Subject: IE rebirth - and XForms support


>
>
> http://blogs.msdn.com/dmassy/archive/2004/06/16/157263.aspx says:
>
> > "I'm returning to work on the Internet Explorer team.  .. ... I'm 
> > very
excited to be returning to the team where we clearly have much work to do.
..
> >
> > What am I going to be doing? I'll be on the Program Management team
focusing on helping customers and bringing customer feedback to the team. ..
> >
> > What are we planning for Internet Explorer? Tony Chor the Group 
> > Program
Manager on the team put it well on Channel 9. At this stage there isn't much
more to add other than to reiterate the point that the Internet Explorer
team does exist and does care. In my new job role I'm very interested in
hearing about what you the customers would like to see. ..
>
> See the blog for more details on how to request XForms support in 
> Internet Explorer, if you are minded to.
>
> cheers,
>
> Jason
>
>
>