Sony Reader 4-151-151-13(1) User Manual page 54

Reading Books
Display item Description
Digital Displays the following only if a book with DRM is
Rights selected. (BBeB, PDF and EPUB file only)
Full viewable: The entire book can be read.
Restricted: Some or all of the book cannot be read.
Expiration Displays the expiration date of the book if the book
date with DRM has an expiration date. (PDF and EPUB
file only)
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