The namespaces and names of properties are not completely separated. It seems that the concatenation of the namespace and the name uniquely identify a value. Because of this it is possible to delete values in other namespaces. For an example of this behaviour try to set a property with namespace 'DAV:c' and name 'reationdate'. The 'DAV:creationdate' property will disappear. This does not affect 'DAV:acl'. This is probably because it is stored different in the store than the other properties. I suspect the problem is in org.apache.slide.content.NodeRevisionDescriptor as it uses a concatenation of the namespace and the name without a special separator as a key for the properties map.