Example of OEM Syntax

bib: &1
   { paper: &2 { ... },
     book:  &3 { ... },
     paper: &4
          { author: &10
                  { firstname: &15 "Serge",
                    lastname: &16 "Abiteboul" },
            author: &11 { ... }
            title: &12 { ... }
            pages: &13
                 { first: &17 122,
                   last: &18 133 },
            references: &2,
            references: &3
          }
   }