Hi Bosung,
To achieve this, you should create a custom search with a helper entity inside a dataview. Then, place the three data grids within this dataview. Each data grid should have a datasource microflow that retrieves objects based on the values provided in the custom search.
Thanks
What you could do is create a non persistable entity where you can specify the search criteria. Use this NPE as the context of your page (you will need to create a dataview with a datasource microflow/nanoflow to create the object, because a NPE only exists in memory). If you place your datagrids inside the context of the NPE object, you can use the attributes in the xpath constraint for the datagrids.