Hello, I would like to clarify part of the text in the book. Page 42. A Jess symbol can contain letters, numbers and the following punctuation marks:.... A symbol may not begin with a number. Some of the punctuation marks ($, ?, and =) cannot be used as the first character or a symbol, but can appear in other positions. Page 48: Most variables in Jess are written as symbols that begin with a question mark(?). the question is part of the variable's name. Although it is legal to do so, it is considered bad style to use any other punctuation marks except dashers(-) or underscores(_) in a variable name, Q1. I am kind of confused because in pg 42, it is mentioned that a symbol cannot have ? as the first character. However in page 47, it is pointed that most jess variables are written as symbols that begin with a question mark. I tried to do (bind x 100), it did not work. Q2 . Can I clarify that ALL variables in Jess MUST start with a question mark ? Many thanks!! Regards, David [ Moderators note -- tens of KB of stylesheets and such deleted. Please send only plain text email to this list. Thanks. ]
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