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User's Guide 44
PAL
TM
Print and Program Language Features
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Page Description Language
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No control Codes (easy to pass through networks, filters, etc.)
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Compatible with midrange and mainframe computers and any host or PC programming language.
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Is an executable language
" Procedures can be defined
" Functions
" Conditional statements
" Loops
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Can create and use simple and/or complex data formats
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Can gain full access to resident printer features
" LCD
" Interfaces
" Keys
" Keyboards
" Internal Memory drives
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Language is Reverse Polish Notation (RPN)
" Like HP Calculator
" Arguments first then operators i.e. 4 6 + versus 4 + 6 =
" Data passed on stack
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PAL
TM
Coding Structure is Free Form
" All operators, objects, and data are separated by whitespace: CR, CR+LF, LF, LF+CR, Tab, or Space.
" Extra lines in data are OK
" Comments may be added proceeded by % character.
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Powerful Object handling
" Basic Objects: Integers, Fixed-Point, Boolean
" Composite Objects: String, Name, Arrays, Dictionaries, Procedures