WP_POST_REVISIONS(false,integer) // the bigger the protject, the smaller the value (performance)

WP_DEBUG(true,false) // only true to show errors in development

SAVEQUERIES(false,true) // shows all wordpress database queries, useful for debugging

WP_MEMORY_LIMIT(integerM) // the maximum file-size for WordPress to load

WP_LANG(language) // define the default language

LANGDIR(directory) // folder for language-files, possibility to create own lanugage files

CUSTOM_USER_TABLE // possibility to use same user-database for more than one installation of WordPress