<http://schema.org/about>
"TECHNICAL SPECIFICATIONS; THE DISTRIBUTION OF STEEL LONGITUDINAL And TRANSVERSAL; SECTION TYPICAL OF LIGHTENED CEILINGS; DETAILS OF  SUPPORT COLUMNS AND BEAMS; DETAILS OF ANCHORS."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/structural-plans_67646>