Deprecated - Documentation

I need if somebody could say me where finding any description of the DB tables

In the few months that I have used Drupal, the most frustrating aspect of the experience has been the lack of documentation to support contributed modules. I had indeed abandoned several modules days along the way, because there was really no guidance on how to make them work. This underlines the general problem that techies face when presenting solutions meant for the real world .In our own experience we feel enlightened to have been able to present useful tools - whereas the consumer feels nothing other than obfuscation , because they have no idea how to use these tools.

Looking at http://api.drupal.org/api/HEAD/file/developer/topics/forms_api_reference...

It says: "The #default_value will be today's date if no value is supplied."

I've found this to be incorrect. For me the date always defaulted to Jan 1, 1900, if no value was specified. One other person in #drupal confirmed this as well. If I didn't have a saved value to provide, I had to specify an array based on date('Y'), date('n') and date('j') to default to today.

I just noticed after installing the API module that the group/files and other page links on the front do work. Is this because the files are not there or is it a bug. Doing a search for the missing files on CVS has gotten no where.

Hi! I’m a new Drupal user. I have a question about customizing data fields that the user enters. When the user registers and enters a value like postal code or ID number, how do I validate it to ensure that the format is (Letter – Number – Letter – Number – Letter – Number) for the postal code and that the ID number is within a certain range of numbers?

Is there a module that will help me do this? Any help would be great!

Thanks!
Jeff

Hello,
Is a documentation exist for the Voting API ???
Thanks for your help
Cyprien