A property that contains a Cushion object that describesthe hammer cushion. Multiple Cushon objects can be associated withtthe hammer to account for multiple drives that might occur for thepile driving activity if the cushion is changed out betweendrives.
Database handle for the object. It is of XML type ID, so is constrained to beunique in the XML document within which it occurs. An external identifier for the object inthe form of a URI may be constructed using standard XML and XPointer methods. This is doneby concatenating the URI for the document, a fragment separator, and the value of the idattribute.