Add custom node problem!!!

[Nedim]

Hi guys,

I have a node definition where i have some attributes that i add as node 
properties. definition :

<propertyDefinition autoCreated="false" mandatory="false" 
multiple="false" name="cc:author" onParentVersion="COPY" 
protected="false" requiredType="String"/>
<propertyDefinition autoCreated="false" mandatory="false" 
multiple="false" name="cc:date" onParentVersion="COPY" protected="false" 
requiredType="Date"/>
<propertyDefinition autoCreated="false" mandatory="false" 
multiple="false" name="cc:summary" onParentVersion="COPY" 
protected="false" requiredType="String"/>
<propertyDefinition autoCreated="false" mandatory="false" 
multiple="false" name="cc:title" onParentVersion="COPY" 
protected="false" requiredType="String"/>

The problem is that after some time (a batch script updates repository 
every hour) my node gets property cc:author and jcr:author an jcr:date, 
jcr:summary and so on. But i never defined that attributes did someone 
has the same problem.

Thanks, Nedim