This is a "getter"
TopicFunction that returns a list of known
TopicTypes
in a given web. Use it to create a selection in
DataForms for the TopicType formfield.
It adds the "none" type so that you can have (temporarily) un-typed topics. The
type "TopicType" is added
hardcoded so that you don't have to rely on that type
being present in your web and to allow bootstrapping a type system in a web from
scratch on as you will be able to create an initial TopicType TopicType this way.
Parameters
- WEBS: list of webs to search for TopicTypes, defaults to BASEWEB
- EXCLUDE: expression to exclude types (optional)
- ADDITION: types that are listed additionally (optional)
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