Personally Identifiable Information can be split into two different types of data – linked and linkable. Linked data is information relating to a specific person, like your personal email address, home address, ID number, passport number or bank account details.
Linkable data is information which could be about any number of different people, but which, when used together with linked data, can provide further details about an individual. Linkable data includes a person’s city, country, sex, gender, race, religion, workplace or job title.