Anonymization is not just deletion of sensible information. For any further processing (whether by humans or information systems) the anonymization process must preserve the meaning of the anonymized information. Together with the anonymized document, PG conserves all metadata concerning the anonymized entity e.g. whether it was a person’s name, a date, a place etc. In special cases, such as dates, it is also able to preserve the temporal sequence of events by starting from a specific moment in time (called “time 0”, the reference time according to which incomplete dates are calculated). Moreover, in specific domains such as the medical domain, it can provide very specialized information, such as whether the anonymized entity was a doctor or a patient, if a specific date is a date of birth or the date of a medical intervention, etc.