How to Pass Parameters from Parent to Child Interface in a Tab-Based Navigation

Question

Hi, 
 I have a Child Interface with a Submit button and a File Upload functionality. It has two Rule Inputs: 
 
 cancelInput (Type: Boolean) 
 uploadedFile (Type: Document) 
 
 Now, I&rsquo;m using a Parent Interface that has a Tab-based Navigation layout, and I want one of the tabs to display this Child Interface. However, the system prompts me to pass the two parameters ( cancelInput and uploadedFile ) when I call the Child Interface using rule!ChildInterface() . 
 How can I effectively pass these parameters from the Parent Interface to the Child Interface while keeping the setup simple? I&rsquo;d appreciate any tips or examples! 
 Thanks in advance for your help! 
 Naveen k Rajakumar

Stefan Helzle · Accepted Answer

I think the best way to do this is to create two rule inputs with similar names on the parent interface and pass these to the child interface. 
 Maybe this blog post helps you to understand how to work with data in interfaces: https://appian.rocks/2022/07/05/data-in-interfaces/

gayatria0439 · Answer

Hi naveenkumar11800 , 
 To effectively pass the parameters from the Parent Interface to the Child Interface we need to create the rule inputs with the same type, generally When we call an interface within another interface, we need to pass the necessary parameters to handle actions or transfer values between interfaces. We can use either local variables or rule inputs, depending on the requirements, Rule inputs are like global variables and it can be managed through the process model. Or if you need to use the values within the interface itself, you can pass local variables. 
 Example of passing variables: rule!Interface ( cancelInput : ri!cancelInput/local!cancelInput, uploadFile : ri!uploadFile/local!uploadFile)

How to Pass Parameters from Parent to Child Interface in a Tab-Based Navigation

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