The Library section lists new editions and transations of the Rubáiyát, published after 2008. Earlier editions are described in the recent bibliography "The Rubáiyát of Omar Khayyám. An updated bibliography" (Leiden, 2010). In this chapter, there is no limitation in years of publication regarding material in the other Library sections, as they are not part of the Bibliography.
In the Publications chapter, the selection is limited to the most recent works, i.e. the last fifteen years.