2.5.2.  Element property

To define a property you can use element property.

The property element supports various conditions which affect's in setting the property or not.

Attributes

Name	Description	Required
name	The name of the property.	yes
value	The value of the property. The value can also be set by attaching the text as element content.	yes
Condition attributes (only one condition can be defined)
if	The property will be set only if a property with this name exists.	false
unless	The property will be set only if no property with this name exists.	false
available	The property will be set only if the resource or class exists. In case of a Java class the existence will be tested using Class.forName( class). In case of a Resource the existence will be tested using ClassLoader.getSystemResource( resource).	false
istrue	The property will be set if the attribute value is "true" (ignoring case).	false
isfalse	The property will be set if the queried property does exist and the attribute value is "false" (ignoring case).	false