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HCL Domino Designer Basic User Guide and Reference
This guide provides information on using HCL Domino Designer and programming language reference information.
Formula Language
This section documents the formula language.
Formula Language Rules
Formula language provides syntax and @functions for evaluating constants and variables, and for performing simple logic. Variables can be fields in Notes® documents or temporary variables (also called temporary fields) used only for the immediate formula.
Using the syntax rules
You understand formula language through its:
Lexical elements
A formula consists of one or more statements, each consisting of any of the following:
Examples: Lexical elements

Examples: Lexical elements

D is a variable, := is an operator, and @Created is an @function without arguments. This formula assigns the creation date of a document to D.
```
D := @Created
```
@Trim is an @function with an argument. The argument, Subject, is a variable. This formula removes extraneous spaces from Subject.
```
@Trim(Subject)
```
@Prompt is an @function with three arguments. The first argument, [OK], is a keyword; the second and third arguments are text constants. This formula displays a dialog box.
```
@Prompt([OK]; "Update Complete"; "Your update has been posted")
```
SELECT is a reserved word and @All is an @function without arguments. This formula selects all documents for an operation, for example, for inclusion in a view.
```
SELECT @All
```
LastName is a variable, + is an operator, ", " is a constant, and FirstName is a variable. This formula concatenates LastName, a comma followed by a space, and FirstName.
```
LastName + ", " + FirstName
```