A Standard-conformant mode
B Optional case insensitivity
C Use of square brackets
D Scripts D.1 Script interpreter D.2 Syntax D.2.1 Script header D.2.2 Example D.3 Platform considerations D.3.1 Apple Mac OS X D.3.2 Unix D.3.3 Microsoft Windows D.3.4 Selecting an implementation
E Source code representation
F Use of library versions
G Unique library names