reference for attributes of ui.xml

[Kang Jeong-Hee <Keizi mail co kr>]

Hi.

I'm giving a try to bonobo-ui.
the ui.xml is good fashion I think, but hard to find referable resource.

here a sample case:
"""
<dockitem name="Toolbar" _tip="Main Toolbar" config="0" behavior="exclusive" in_new_band="1" hlook="system" vlook="system">
        <toolitem name="Go_Back" verb="" _label="Back" priority="1"/>
        <toolitem name="Go_Forward" verb="" _label="Forward"/>
"""
I know name, tip, label, and possibly understand priotiry, in_new_bad.
but others are strange to me.

Is there a reference describing properties for those attributes?