Drupal Folder Structures

drupal-7.0

  - includes/

  - misc

  - modules

  - profiles

  - scripts

  - themes

  - web.config     -> xml file config like .htaccess

  - .htaccess      -> server setting for this folder

  - uthorized.php  -> authorize file access

  - cron.php

  - index.php      -> direct to ROOT/includes/bootstrap.inc

  - install.php    -> direct to ROOT/includes/install.core.inc

  - update.php     -> update to another version

  - xmlrpc.php     -> handling xml-rpc request from clients

  - CHANGELOG.txt  -> new features in each version

  - COPYRIGHT.txt  -> copyright info

  - INSTALL.mysql.txt  -> config mysql for installation

  - INSTALL.pgsql.txt  -> config postgreSql for installation

  - INSTALL.sqlite.txt -> config sqlite for installation

  - INSTALL.txt        -> guide how to install drupal

  - LICENSE.txt        -> license doc

  - MAINTAINERS.txt    -> developer team

  - README.txt         -> general insight

  - robots.txt         -> search engine crawling config

  - UPGRADE.txt        -> upgrade instruction guide

   

You can browse drupal source code in http://drupalcode.org/viewvc/drupal/drupal/