2.2.6.5.3 EDMSimpleType Property
Properties of type EDMSimpleType MUST be represented as a single (root) XML element in the data service namespace, as described in Common Serialization Rules for XML-based Formats (section 2.2.6.1), with the same name as the property. The element MAY have an m:type attribute to specify the Entity Data Model (EDM) type of the property. If the m:type attribute is missing, the EDM type of the property MUST be assumed to be Edm.String. The text value of the element MUST be equal to the value of the property. The property value is formatted, as described in the EDM Primitive Type Formats for XML Element Values table in Common Serialization Rules for XML-based Formats (section 2.2.6.1).