References are defined as any kind of material used to document an Event. They have 3 kinds of attributes : a Source (the origination of the information), a Type (the category it pertains to) and a Date. The Reference Type will depend on the Source, meaning that the Types you can select from the dropdown menu vary according to the Source you have selected. . Current entries in MPI include :
- Court : Any Court or Tribunal, civil or military, passing sentences, regardless of its legitimacy. Current Reference types for Courts include Court Ruling, Hearing, Information.
- International Institution : Any public International Agency or Court (UN, EU, NATO, WHO etc.). The reference type they are entitled to issue are Conference paper, Court Ruling, Document, Information, Letter, Press Release, Report.