Tag and taxonomy management

[petter]

Hi,

Trying to decide whether Alfresco is what we need within our organisation… Comparing its features to Sharepoint. One in particular:

"top-down taxonomy and bottoms-up social tagging"

I.e. having a (hierarchical) taxonomy which is pre-determined, and making it very easy to classify content (documents) according to this (Sharepoint has the type-ahead feature with dropdown with alternatives, which seems to me best-in-class).
And add to this the ability to add own tags (if they can be re-used within a certain scope in the system, as they seem to be able to in Sharepoint, the better) to content.

I would love a tutorial on how to, if not accomplish this then at least come as close to as possible, in Alfresco.

(I'm pretty confused by the 'categories'>'tags' in Alfresco Explorer and the 'tags' in Share, and their respective use, which I have not been able to reconcile…)

Thanks!!

[petter]

To exemplify the above a bit:

Could 'categories' be seen as the top-down classification scheme, while 'tags' are supposed to be user-created? And the category 'Tags' is where they could meet (i.e. users wanting to tag content will have some pre-defined tags but are also free to create their own)?
Seems nice enough, only I cannot get it to work this way.
I created a couple of categories under 'Tags'. But after adding a piece of content, adding to it the aspect 'taggable', and click 'edit metadata'>'Tags/Select' these tags/categories won't appear for selection. Have I missed something?

Also, while Categories>Tags can be structured into a hierachy, there is no way to enter tags in a hierarchical fashion from the content tagging dialog? Or, alternatively, to re-structure user-added tags from some administration console?`

Thanks!