yes, you can literally copy and paste (though as you know, you'll need to change the Object's NAME Attribute, as it must be unique, no NAME Attribute can be the same, as it's the ID for the quest engine to differentiate all things, such as Objects, within quest:
<asl version="550">
<include ref="English.aslx" />
<include ref="Core.aslx" />
<game name="XXX">
<gameid>XXX</gameid>
<version>1.0</version>
</game>
<object name="room">
<inherit name="editor_room" />
<object name="player">
<inherit name="editor_object" />
<inherit name="editor_player" />
</object>
</object>
</asl>
let's say that we want to copy and paste our 'player' Player Object to multiple rooms, as we want to have the user to be able to pick which character to start the game with (thus starting at a different location), for example, there's 5 characters (human, dwarf, elf, gnome, or halfling) to pick 1 hero from, whom you'll use to play through the game with, who'll have their own unique start location, interactions, events, ending, and etc within the game world's story~plot. Anyways, here's the relevant coding that you're asking about doing~using:
as can be seen below, I'm literally copying and pasting, lol:
(altering code, is creating the initial settings for~of all that is your game, you're creating your game, so you can copy and paste, delete, alter, and etc all you want, as this is your game creation, via code. You're not in the middle of playing the game, lol)
(I'm literally copy and pasting 'room' and 'player', hehe)
(I'll space the stuff, which actually can be done without causing code issues btw, so it's more easy for you to read~understand)
<asl version="550">
<include ref="English.aslx" />
<include ref="Core.aslx" />
<game name="XXX">
<gameid>XXX</gameid>
<version>1.0</version>
</game>
<object name="room">
<inherit name="editor_room" />
<object name="player">
<inherit name="editor_object" />
<inherit name="editor_player" />
</object>
<object>
<object name="room2">
<inherit name="editor_room" />
<object name="player2">
<inherit name="editor_object" />
<inherit name="editor_player" />
</object>
</object>
<object name="room3">
<inherit name="editor_room" />
<object name="player3">
<inherit name="editor_object" />
<inherit name="editor_player" />
</object>
</object>
<object name="room4">
<inherit name="editor_room" />
<object name="player4">
<inherit name="editor_object" />
<inherit name="editor_player" />
</object>
</object>
</asl>