A common scenario, especially for people who are creating ADF applications that extend or integrate with other systems, is the need to call an ADF page and pass some parameters to it.
For example, suppose you are in Oracle E-Business Suite and you are looking at a department and you want to invoke an ADF page that will show you more details about this specific department.
To achieve this you can expose bounded taskflows with a URL and define parameters that the taskflow will accept on the URL line.
In the following demo I show how to create a taskflow that shows a filtered VO, and then how to call this taskflow using a URL and pass the parameter that controls the filtering.
Update - in some cases you don't need a full taskflow for this. Here is an entry that shows you a simpler approach if you just need to reference the parameter in the page itself.