How to implement our website concept
Hello
I'm working for a city administration and we are currently considering to switch our (typo3 based) cms to drupal.
Since I'm just learning the ropes of drupal I'm not yet sure our concept can easely be implemented.
The page should consist of a welcome page which leads to several sections. (fullscreen with no header, footer, sidebars -> can this be done with a custom view?)
Every section should have it's own "homepage", an url that representions the section (www.domain.ch/section/...), it's own theme (or at least diffrent colors) and the it's own navigation menu (navigation menus from other sections should not be visible). But there should be tabs to access the other sections.
registered Users should be able to add content to possibly more then one section and administrators should be able to modify the menu of there sections only.
Ideally files (official forms as pdf files) should be available from within all sections. (without leaving the section)
I would appriciate some feedback wheter that's realistic, what's the best approach (using Taxonomy, different sites,...) and maybe some hints what modules whould be useful.
Kind regards
T. Frey

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Yes, this is all common drupal functionality. There are several ways to do the home page-- probably creating and theming a page-front.tpl.php file the way you want. You can do the sections with the og module or taxonomy. Files can be handled by the core upload or the flexible filefield module (replaces upload in d7).
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OG and/or Open Atrium
You should look at Organic groups.
You might install Open Atrium, which is like a distribution of drupal with configured Spaces and Organic groups Spaces. a href="http://drupal.org/project/spaces">spaces, context, and features, modules developed by Development Seed, are fairly complex to understand (read: little documentation), but they have been successful in implementing them. Why they chose the worst names for their modules is beyond me though.
if you choose to go at it on your own, you can just install Organic Groups to create sections that are membership based. Then, you could add links to each group as primary links or what not.
In either case OG provides a group home page, multi-group posts, and themes. Navigation menus per group could be created using the views module or via spaces/context/features if you can get your head around how to use those independently.
Thanks
Thanks for the recommendations.
I've read about Organic Groups before and will take a deeper look now. Since I would like to keep as much control as possible Open Atrium isn't my first choice but it may be viable inspiration and a possible option for our intranet.
kind regards
t. frey