Best way to find starting directory

Dave Angel davea at davea.name
Wed Mar 20 11:17:31 CET 2013


On 03/20/2013 05:38 AM, Frank Millman wrote:
> On 20/03/2013 10:56, Dave Angel wrote:
>> On 03/20/2013 01:58 AM, Frank Millman wrote:
>>> On 19/03/2013 17:03, Dave Angel wrote:
>>
>>    <SNIP>
>
> Dave, I really appreciate your input, but we are talking at cross
> purposes somewhere along the line - I am not sure where.
>
> Firstly, just to ensure there is no confusion, I am not talking about
> *database* schemas, I am talking about *xml* schemas. From Wikipedia,
> "An XML schema is a description of a type of XML document, typically
> expressed in terms of constraints on the structure and content of
> documents of that type, above and beyond the basic syntactical
> constraints imposed by XML itself."
>
> Let's focus on 'form definitions'. What I call a 'form' is something
> that can be displayed on a user's screen, for data entry, data display,
> or both, containing text, input fields, checkboxes, buttons, etc, etc. I
> have devised an xml format to describe the form. When requested, the xml
> file is read in and sent to the client, which extracts the elements and
> renders them on the screen.
>
> All form definitions are stored in the database. To ensure that they
> conform to the standard structure which the client is expecting, I have
> written an XML schema that can be used to validate the content.
>
> The XML schema is stored in its sub-directory permanently. Once
> debugged, it will never be altered. It is the equivalent of source code,
> that is read and interpreted at execution time.

That paragraph says it all.  It's constant, so it belongs with the 
source code.  Somehow I thought you were writing the xml into that 
directory.  Thanks for clarifying.

>
> When a user selects a menu option, the form definition is read in from
> the database, parsed and validated by lxml using the schema, and if ok
> it will be sent to the client for rendering. Otherwise an exception will
> be raised.
>
> Hope this makes more sense.
>
> Frank
>
>


-- 
DaveA



More information about the Python-list mailing list