An expression is represented as a string. Whitespace is preserved to allow the author to add formatting (tabs, newlines, etc.) A simple text type that preserves whitespace Represents a positive integer that supports infinity. The absence of the value attribute represents infinity. The absence of the element indicates that no value has been set. a reference to the FM model as specified by its path. QF currently recognizes the following references 1. the search path to a model package in the content store (/content/package[@name='GoSalesML']/model[@name='Model']) 2.the logical connection name described in nsgeneral.xml (GOSALES_ORACLE) 3. the physical path to the RTM model file (E:\bering\GOSALES_ORA.rtm) 4. the physical path to the xml model file (E:\beging\models\GOSALES_ORA\model.xml) 5. the physical path to the FM project file(E:\bering\models\GOSALES_ORA\GOSALES_ORA.cpf). Reference 1 is the reference expected from QF clients. The other references are supported for internal development. Specifies a sorting order to be used for the element. It will describe either the detail or group sorting for the element in contains depending on what that element represents.