[04:19:03] <wm-bb>	 <u99of9> Does this help: https://www.wikifunctions.org/wiki/Wikifunctions:Function_model#Lightweight%20enumerations ? They are constructed by staff after a Type Proposal which includes a list of the required QIDs in order. They are used to make new "Types" in an easy way. It's often helpful to have a Type that is limited to a specific set of options, because that can constrain
[04:19:03] <wm-bb>	 the optio <clipped message>
[04:19:03] <wm-bb>	 <u99of9> ns for input or output from a function. So, for example, the Chemical Element type you mentioned, is the input type in the function: Z27954. Go there, and you can only choose from one of the options initially specified in Z27951. (re @amire80: Thanks, but I'm not sure that I understand. How are they constructed? What are they used for?)