Things instead of Items in the Sitemap

I’m wondering if would be possible to use things directly in Sitemap instead of items names?
I have some of things added using PaperUI. They they detected automatically some parameters and linked them tho the Items.
Now, I use BasicUI for daily operations. In order to get all informations under some of the Thing, I need to specify every Item or if want’s to have more dynamically entry then show Group.

Syntax like:

Frame  label=boo {
    Text item=item1 

but maybe you noticed, if you make syntax error in file.sitemap then in the BasicUI Things appear. When you click on the Thing you get nice grouped items under it.

I’m wondering if we see Things when there is an error in sitemap, could we use in file? If so how? Where BasicUI does take Things from?