Are the markups permanent or temporary: this may have a big impact on the 
approach you can take? If temporary they should be created in the Session 
Repository which should at least avoid whatever may be causing corruption of 
the main repository. If users are creating their own markups do they need to 
share the same resource? Why can't they each have their own temporary session 
based SDF? This will probably avoid any corruption.

The fact that you are trying to delete them suggests they are somewhat 
temporary. If they were created based on the session id then when the session 
expires you might create a process to delete the expired ones. Just a thought.

Dave

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of r0ss
Sent: Tuesday, April 22, 2008 12:11 PM
To: 'MapGuide Users Mail List'
Subject: [mapguide-users] Creating mark ups / redlining using anything other 
than SDF
Importance: High

All,

We have encountered a critical flaw with MapGuide in particular the 
undocumented use of the SDF format to create multi user based red lines - the 
default samples all highlight this is the approach.

As an example, we created an application that allows users to each create, 
modify and display redlines from the same SDF file (as per the sample).  We 
were recently informed by Autodesk that the SDF format is not meant to serve as 
a mutli-user creation format (which is an undocumented feature by the way!).

During our testing when multiple users create redlines at the same time - the 
repository become corrupt and forces us restore the previous MapGuide package 
(does anyone know how to automate the deletion of SDF files in the repository 
without knowing the names of the repository names - i.e. the users create 
redlines and we do not know the repository names)

The big ask:
Does anyone have any experience creating redlines in anything other than SDF, 
notable SQL Server 2005, GML, KML, etc (we are not an Oracle or PostGIS shop) 
or any other work arounds we would greatly appreciated we are at a loss and in 
a time crunch.

Regards

R0ss
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