An attributeType can be used in 4 different ways.  I think this is saying that the attribute is something that is internally managed by the directory rather than something manipulated for a specific application.
 
Alex

 
On 4/4/07, Ole Ersoy <ole.ersoy@gmail.com> wrote:
Can someone please help me understand what this is for?

ldapAttributes.put( MetaSchemaConstants.M_USAGE_AT , "directoryOperation" );