How to link tables

You can link objects from different models so you have "shadow copies" of tables/regions/relations/notes/images in the "child model".

First delete the tables in the child models. Then use
File > Add/Link model > Add/Link model from File
to open the "master" model.

Select where the objects should be placed on the canvas.
Then select the Tables/regions... you want to have in the child model.

They will be pasted from the master model into the child model.
You can see if a table/relation is liked by the blue outlines and header (see the News/Employee tables in the order.xml example)
You have to change the table in the master model.

In the child model select File > Add/Link Model > Refresh Linked Objects.

Then the tables in the child model will be updated.