QML.xsd -- Quantity Modeling Language schema. 0.01 Jun. 14 2004 - first draft schema (brian thomas; baba-luu@earthlink.net) 0.02 Jul. 8 2004 - Allow inheriting Q schema to add attributes to their Q's. The atomic quantity .. a single "value" only This is an intermediate to restrict PCDATA in quantity except for trivialQuantities