Comment lines begin with a pound symbol (#) and all other characters up to the end of the line are ignored. Every other line that is not blank is composed of a keyword, an equal sign (=), and information that applies to the keyword.
The example below is a counter that can be included within an HTML page as an image. When clients access the page containing this counter it automatically increments. There are optional keywords for customizing the counter that are not used here.
# Example: counter.vxn
ContentHost = Vaxxine Computer Systems
VXNClass = Counter VXNSub = Basic
DigitMax = 5 DigitPad = No
This keyword appears in every VXN file and must be set to "Vaxxine Computer Systems" to work.
This keyword appears in every VXN file and specifies the general type of WWW Extension you require. Several different VXNs are available in each class. For instance, there are classes of VXNs that are dedicated to managing WWW users, providing counts of visitors to your site, offering guestbooks for your users to sign, and much more.
Within each class there are a number of specific VXNs that provide particular features. For instance, there are different guestbooks that provide various options such as the ability to send new entries via e-mail or present the information slightly differently. The particular type of VXN within the class is specified with the VXNSub keyword.
The DigitMax keyword is specific to this VXN and specifies the maximum number of digits to be displayed. The DigitPad keyword is also specific and indicates whether or not the number displayed should be padded with zeroes. Several required and optional keywords are available for each VXN.