When a property is extracted, which is part of an aspect, it is possible to remove all other properties in the same aspect that do not have an extracted value. In this way only extracted values will be set and any previously set aspect properties will be cleared. By default, this does not take place and newly extracted values are just added to the node’s properties. To clear other aspect properties add sys:carryAspectProperties = false to the Map returned from the extractMetadata method.