IRIX PHP Library - Measurements Section.
$sampling_period :
$location :
$measurements :
$sample_type :
$sample_type_description :
$location_offset :
$value_type :
$sampling_depth :
$surface_type_description :
$volume :
$sample_treatment :
$sample_treatment_description :
$description :
$_xml :
__construct()
toXML()
getXMLElement()
readXMLElement( $domelement)