+:attr:`scored`
+ For an object: awards `OBJECT_SCORE` points when taken for the first
+ time. For a room: awards `ROOM_SCORE` points when visited for the
+ first time.
+
+.. index::
+ pair: static; library attribute
+
+:attr:`static`
+ For an object: can't be taken.
+
+.. index::
+ pair: supporter; library attribute
+
+:attr:`supporter`
+ For an object: other objects can be put on (but not in) it.
+
+.. index::
+ pair: switchable; library attribute
+
+:attr:`switchable`
+ For an object: can be switched off or on.
+
+.. index::
+ pair: talkable; library attribute
+
+:attr:`talkable`
+ For an object: can be addressed in "object, do this" style.
+
+.. index::
+ pair: transparent; library attribute
+
+:attr:`transparent`
+ For a :attr:`container` object: objects inside it are visible.
+
+.. index::
+ pair: visited; library attribute
+
+:attr:`visited`
+ For a room: is being, or has been, visited by the player.
+
+.. index::
+ pair: workflag; library attribute
+
+:attr:`workflag`
+ Temporary internal flag, also available to the program.
+
+.. index::
+ pair: worn; library attribute
+
+:attr:`worn`
+ For a :attr:`clothing` object: is being worn.