De?ne the simple types

Atypeappropriateforthelettergradesthatstudentsreceiveoncompletionofacourse— A, A?, B+, B, B?, C+, C, C?, D, and F. Express this type in two di?erent ways: as an enumeration and using the pattern tag of XML Schema.

What will be an ideal response?



..........


Inthe gradesAsPattern representation, (...) represent complexalternatives ofpatterns separated by | (W3C has adopted the syntax of regular expressions used in Perl), [...] represent simple alternatives (of characters), and ? represents zero or one occurrence, as usual in regular expressions.

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