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This document uses the same notation as the Fortran 90 standard. In
particular, the same conventions are used for syntax rules. BNF
descriptions of language features are given in the style used in the
Fortran 90 standard. To distinguish HPF syntax rules from Fortran 90
rules, each HPF rule has an identifying number of the form H
,
where 
is a one-digit major section number and 
is a one- or
two-digit sequence number. The syntax rules are also collected in
Annex 
. Nonterminals not defined in this document
are defined in the Fortran 90 standard. Also note that certain
technical terms such as ``storage unit'' are defined by the Fortran 90
standard; Annex identifies the Fortran 90 rules
defining these nonterminals. References in parentheses in the text
refer to the Fortran 90 standard.
