Net.Data Reference Guide

Net.Data Built-in Functions

Net.Data provides a wide variety of functions that you can use right away without a FUNCTION block. The function names are not case sensitive. Net.Data built-in functions are divided into these categories:

General purpose functions help you develop Web pages with Net.Data and do not fit in the other categories. See"General Functions".
Math functions perform mathematical operations. See "Math Functions".
String manipulation functions modify strings and characters. See "String Functions".
Word manipulation functions change words. See "Word Functions".
Table manipulation functions help you customize your tables. See "Table Functions".
Flat file interface functions perform file input and output. See "Flat File Interface".
Web registry functions perform operations on a Web registry "Web Registry Functions".

Many functions have one or more of the following forms:

Functions beginning with DTW_, DTWF_, and DTWR_ return their results in an output parameter. You must specify the output parameter. This example shows the server time:
```
@DTW_TIME(nowTime)
Current local time is $(nowTime).
```
Functions beginning with DTW_r, DTWF_r, and DTWR_r return their results to the function call, so they do not have an output parameter. This example shows the server time, the same as in the previous example:
```
Current local time is @DTW_rTIME().
```
Functions beginning with DTW_m perform the function on multiple parameters. Each parameter behave as both an input parameter and an output parameter. The results are returned to the respective input parameter. This example converts the 3 input parameters to all capitals for a consistent look in the display:
```
@DTW_mUPPERCASE(model, style, shipNo)
Shipment $(shipNo) contains $(quantity) of model $(model) $(style).
```

Function parameters must be placed in the correct order. All input parameters before the last input parameter can be specified, or specify a null ("") to accept the default. For example, you can call DTW_TB_INPUT_TEXT this way:

@DTW_TB_INPUT_TEXT(myTable, "1", "2", "", "", "32")

The fourth and fifth parameters use default values. They must be included as nulls to indicate "32" is the value for MAXLENGTH in the generated HTML. The final parameter is not specified so the default is used. If you chose to accept the default for MAXLENGTH and the two previous parameters, simply omit them:

@DTW_TB_INPUT_TEXT(myTable, "1", "2")

You must specify intermediate null values in the parameter lists for input parameters when there are subsequent non-null input parameters. You do not need to specify intermediate null input parameters before specifying your final output parameter.

In the descriptions that follow, function parameters are described as being of type string, integer, float, and array (array represents a table). All Net.Data variables are of type string but the terms integer, float or array are used to denote a string that represents an integer, float, or array value respectively.

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