xml:lang added. Two roles More than two roles. Two or more roles. isLegallyBinding has been replaced by hasLegalIntent. isConcurrent removed. See ComplexBTA instead. DataExchange is not constrained to support state alignment. Business Transaction retained for conversions businessTransactionActivityRef and businessDocumentRef point to what context and documents are relevant to ConditionExpression evalutation. Variable assumes type, if any, from expression evaluation Exactly one ConditionExpression is used to provide values. If multiple ConditionExpressions are listed, each expressionLanguage value must be different from others in the sequence. Maps a BTA and its BusinessDocuments to Interface/Operation messages interface is called portType in WSDL 1.1