Add If/Else Conditions: using the Execute Condition section to set one or more conditions that must be met for a block to be run when the mashup is used. See for instructions and examples.Add If/Else Conditions: using the Execute Condition section to set one or more conditions that must be met for a block to be run when the mashup is used. See for instructions and examples.Note: | When conditions are not met during use of the mashup, the block does not run. This stops the flow of results from that block and can cause the mashup to have no results or cause other unexpected behavior. |
Define Error Handling: to determine how the mashup should react if there are errors or no responses from mashables or mashups that are used in this mashup.Add HTTP Headers to a Mashup: using the HTTP Headers section to define specific HTTP headers that should be included in the response for this mashup.Handle Empty Fields for WSDL Web Services: to determine how empty, optional fields should be handled in requests to WSDL Web Services.Use a Security Profile with DirectInvoke: to provide additional authentication information or other security configuration required for secured connections with some web sites or web services with the 
DirectInvoke action.Customizing the Selection XPath for Merge: to handle performance problems.