Model Syntax Rules

When writing a model definition file, there are a number of additional syntax and grammar rules that must be satisfied:

• All keywords, function names, and special-number names are case-sensitive and ASCII only.
• All header keywords can be shortened to a minimum of three characters.
• All strings, symbol names and units support the full UTF8 character set, except for a small number of character tokens that already have a syntactical meaning.
• Block comments are enclosed in /* and */.
• Single line comments are started by // (alternatively ||), and run to the end of the line.
• Spaces and tabs are not significant except in strings.
• Strings must be enclosed in (dumb) double quotation marks " when spaces are to be preserved.
• Statements are closed by the end of the line.
• Statements can be extended over multiple lines by placing a continuation mark \ at the end of the line.
• Multiple declarations can be on a single line separated by commas ,.
• Multiple equations can be on a single line separated by semicolons ;.
• All numbers can be written using these formats: integer, fixed-point, floating-point, scientific and engineering.
• Numbers in scientific notation use a lower case e for the exponent (the upper case E means Exa).
• In declarations the special numbers inf or -inf are allowed, signifying infinite.
• All variables and parameters are limited to a dynamic range from 1e-99 to 1e+99.

Engineering notation uses the following (SI) suffixes: