FileMaker 12 Reserved Words Reference Table
In FileMaker 12 calculations, specific words (in addition to function names) are reserved and have a special meaning.
Reserved words are assigned a numeric value in the calculation engine and are used to supply arguments to various calculation functions. We recommend you avoid using reserved words as field or table names – and take care to enclose them within quotes where you supply them as text literals (for example within script parameters, conditional formatting expressions and so on).
Below is a list of 31 known reserved words in FileMaker 12: