prefix()
Instance Public methods
Returns the namespace of the attribute.
e = Element.new( "elns:myelement" )
e.add_attribute( "nsa:a", "aval" )
e.add_attribute( "b", "bval" )
e.attributes.get_attribute( "a" ).prefix # -> "nsa"
e.attributes.get_attribute( "b" ).prefix # -> "elns"
a = Attribute.new( "x", "y" )
a.prefix # -> ""