Like XForms implementations from other vendors, the Smartsite XForms implementation supports various extension functions.

exforms namespace

The extension functions available within the exforms namespace (http://www.exforms.org/exf/1-0) are:

• relevant()
• readonly()
• required()

Smartsite namespace

The extension functions available within the Smartsite namespace (http://smartsite.nl/namespaces/xforms/1.0) are:

• valid()
• union()
• context()
• sort()
• filterbyproperty()
• label()
• alert()
• hint()
• help()
• elftest()
• validateiban()
• schema-valid()
• constraint-valid()
• required-valid()
• istouched()
• string-format()
• string-ifempty()
• string-indexof()
• string-lastindexof()
• string-pad()
• string-repeat()
• string-enclose()
• string-urlencode()
• string-urldecode()
• string-htmlencode()
• string-htmldecode()
• string-htmlattributeencode()
• loadurl()

For convenience, all the extension functions from the exforms namespace are also available within the Smartsite namespace.