<property name = NMTOKEN url = boolean xml:space = preserve >text</property>
Specifies system property called name, having
text as its value.
url attribute is specified and its value is
text must be a relative or absolute URL (properly escaped like all URLs). In such case, the value of system property is the fully resolved URL.
<property name="color">red</property> <property name="icon.3" url="true">resources/icon.gif</property>