grammar.bnf

# --- Book store ---

<book>		::= <title> <author> <genre> <year> <price>
<title>		::= <word> | <title> <word>
<author>	::= <name> <surname>
<name>		::= <letter> | <name> <letter>
<surname>	::= <letter> | <surname> <letter>
<genre>		::= "Fiction" | "Non-Fiction" | "Mystery" | "Thriller" | "Romance" | "Sci-Fi" | "Fantasy" | "Biography"
<year>		::= <digit> <digit> <digit> <digit>
<price>		::= <number> | <number> "." <digit> | <number> "." <digit> <digit>
<id>		::= <number>


<letter> 	::= "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" | "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z"
<digit> 	::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
<number>	::= <digit> | <number> <digit>
<word>		::= <letter> | <digit> | <word> <letter> | <word> <digit>

<commands>	::= "add" <book> | 
				"remove" <id> |
				"list"

# Query Example
# >>> add "Title", John Doe, Sci-Fi, 2001, 15.10