In entity [toplevel] = SYSTEM "file://localhost/BASEDIR/data_invalid/018.xml" at line 12, position 2: ERROR (Validity constraint): Attribute `idrefs' of element `el' refers to unknown ID `a20'
In entity [toplevel] = SYSTEM "file://localhost/BASEDIR/data_invalid/018.xml" at line 12, position 2: ERROR (Validity constraint): Attribute `idrefs' of element `el' refers to unknown ID `a20'