BuildOp Question

[benny.lbs]

In BuildOp "Properties Page", how can we setup this page to make our BuildOp stage similar to "Aggregator" stage, which properties,

1. Can always be found in "Available properties to add", no matter how many the same properties we have added before. (Similar to "Group")

2. How can program separate this properties that with the same name.

3. How to build up the code that similar to "Aggregator" ==> "Sum Output Column", which can pass the output column to output schema without pre-define in "Build" ==> "Interfaces" ==> "Output" ==> "Table Name"


In "Build" ==> "Logic" page,
1. If we setup the Properties with "Data Type" = "Input Column", how can we get this Input Column 's value in coding ? Only "Properties name == value" ?

Thanks a lot!