Conf: argue !

Hi,

There are some items worth discussing about Conf:, yes.

1. There is only the choice between Conf: loading files or Conf: using 
SQLite.
Background: Conf: doesn't know which db to use. That is 'configured' with 
DataSources configuration.

2. It's funny to throw Exceptions, since you can't debug them.
Background: Exception uses Debug uses Conf:

3. A complete path might be prefixed with (optional);
3.1. 'file://' => which means a file
3.2. 'db://' => which means the db
3.3. 'conf://' => a special hardcoded conf::file, necessary for essentials
Note: this as a replacement for [scope].

4. There is a rule for detecting a filePath in the treePath:
4.1. if it ends with .php or .ini or .xml => a file is requested 
4.2. if it starts with 'file://' => a file is requested
4.3. Otherwise => a domain is requested

5. There is a variable 'version' which can be overloaded.
It means: skip conf_values with version higher than "version".
Version is initially '2.0'.

The new conf: Class is Singleton, and creates children, if necessary.
The structure is such that you can't overload config_values: you must use 
the method set(path,value).
6.1. A child for accessing conf::files, created only if necessary;  there 
is a child for .php, .xml, .ini and for .db
6.3. A child for caching (in memory)  conf_values of a complete domain.
6.4. Any access to Conf: takes care for caching the complete domain 
mentioned in the treePath (files).
6.5. Conf: may be 'configured' for caching: complete (db) or preLoad 
(files). 

7. All values are stored in the db as Strings (mysql type text).
Arrays are stored as ....... please suggest; choices:
7.1 valid php code
7.2 exported format
7.3 var_dumped format
7.4 serialized (manual doesn't like that)
7.5 syntax to be defined ?
Proposal: all text in usage (a description of what the config_value is 
for) is in english and may contain a #stringId#. This could give an admin 
the opportunity to read these descriptions in a nice form in the original 
language and his/her own. This to avoid sloppy translations causing 
misunderstandings.

Cheers,
wim niemans