<!DOCTYPE name PUBLIC "FPI" "URL">
Formal Public Identifier (FPI)
- First Field : - no standard, + standard DTD
- Second Field : name of group or person responsible for DTD
- Third Field : type of document and version number
- Fourth Field : language (2 characters)
- Fields separated by //
<!DOCTYPE BOOK PUBLIC "-//Joseph Smith//General Book Version 5.3//EN" "http://www.library.org/book.dtd">