Example: Querying a Web Service

In this example, we'll use the ddtek:wscall function to query the Swanand Mokashi StockQuotes Web service.

To query the Swanand Mokashi Web Service:

For the target, we'll create a root node (right-click the Set Target Document pane and choose Create Root Element), and a child element, my_quote.

When we're done, our Mapper canvas looks like this:

Now the document URL appears as $ticker_source, allowing us to easily substitute other source documents for use with this XQuery.

Stylus Studio specified location, payload, and output ports based on the Web service we used to create the wscall function block. (Double-click the ports to display this information.) However, not all of the values required to generate the output we need - the specific company stock ticker we want to look up, and what information about that stock we want Swanand Mokashi to provide - has been specified. We'll do that now.

Next, let's specify the information we want from the Swanad Mokashi Web service.

Right-click the Mapper canvas and choose FLWOR Block.

Stylus Studio adds a FLWOR block to the XQuery Mapper.

When we're done with this step, our output mappings look like this:

Here's the XQuery code that Stylus Studio created for us, based on the XQuery mapping: