sapui5 to sap web transaction

Hello to you all,

I am trying to open a transaction threw a sapui5 event (ex. list item click).

While opening that transaction, parameters from the selected list item element in the sapui5 will be sent to that transaction and will fill specific input fields in the transaction such as material number, plant and so on.

Questions:

1) First of all, what is the best why to navigate from sapui5 to sap-web-transactions?

2) Second, how do i navigate while sending parameters? (gateway i suppose but how)

Thank you,