Inputs
Here you define the type and also the number of inputs at the node.
The available data types correspond to those of the "Decompose Container" node. Particularly interesting for composing your own distributions, however, is the "Array Collection" data type, which you will find after clicking on the small arrow button to the far right of Data Type under the "Structure" sub-item of the menu. This data type allows you to select any number of input ports via the plus button. Behind each supplemented data type you will find a text field where you can enter an individual name, which will then also be used for the corresponding input port. Ports that are not needed can be removed by clicking the minus button. Each added input port has its own arrow button, which you can use to specify its data type, e.g. matrix, color, integer (for the index) and float (for the ratio value).
Container In
If a container already exists on which you want to overwrite or add individual properties, for example, forward the corresponding container here to the node.