OpenWGA 7.5 - WebTML reference

Tests if the item or WebTML variable of the given name is "empty"

This attribute tests for all types of WebTML variables visible to the current code and for the items on the current context document.

An item / WebTML variable is regarded "empty" if

• It does not exist (neither as WebTML variable nor as item)
  
• The contents is null
  
• The contents is an empty string or consists only of "blind characters" that are not displayed
  
• The contents is an empty list (size is 0)
  
• The contents is the string "<br>" (which may happen on a rich text item that has been stored empty)

Name of an item or WebTML variable