1 & 2. You'll want to understand the GData API:

http://code.google.com/apis/gdata/

<http://code.google.com/apis/gdata/>3. If you had a Google Apps domain, you
could restrict access to members of your domain in your application
configuration. If you don't, you will need to write your own ACL manager.

4. If you are using only a browser, use the offline API with HTML5:

http://www.youtube.com/watch?v=aQ9w--W4J6U

<http://www.youtube.com/watch?v=aQ9w--W4J6U>With sensitive data, though, you
may not want to do this. Databases are partitioned by domain, but they are
not encrypted locally, so a malicious person could gain access to data by
looking at your local database. Unlike caches, it's not as easy to clear
this data on browser close for browsers that support this functionality.

Otherwise, I'd recommend building a rich client.

On Mon, Apr 12, 2010 at 3:41 PM, fb <[email protected]> wrote:

> Hi,
>
> I'm considering using Google app engine as the platform for the new
> 'version' of an application I'm working on. Without boring all with
> the details, its an application used by medical professionals and part
> of it is making appointments in a diary and sending letters to
> patients based on templates. Based on this my questions are:
>
> 1. Regarding making appointments, I want to utlize using Google
> Calendar. Is there a way I can show the users calendar as part of my
> own app?
> 2. For letters I want to have the google docs integrated again within
> my app like the calendar. Is this possible?
> 3. Users will of course have to have a google account and log in using
> that. Is it easy to only allow certain users access (obviously I don't
> want anyone with a google account to be able to use my app)
> 4. Is there any way that the app could be used offline (no internet
> connection)
>
> Thanks!
> fb
>
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-- 
Ikai Lan
Developer Programs Engineer, Google App Engine
http://googleappengine.blogspot.com | http://twitter.com/app_engine

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