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An orchestrator web service is usually coded in a language outside the XML cheap lion king tickets (http://www.onthebroadway.com/cheap-broadway-tickets/Lion-King.php) domain (e.g., Java), cheap wicked tickets (http://www.onthebroadway.com/cheap-broadway-tickets/Wicked.php) and in this context XQuery is used only to query and transform data—not to orchestrate other web services. However, here we show how a few extensions to XQuery give it the additional role of web service orchestrator, allowing this XML-domain-specific language to implement all the steps in a complex SOA processes. |