Non-visual mind mapping alternatives

[Linux for blind general discussion]

Most of the mind maps I've examined depict hierarchies.  If your instructor wants that sort of thing, an outline might be a reasonable alternative.  There are also various data serialization formats (e.g., TOML) which can encode hierarchies.

Problem is, hierarchies are pretty limiting.  For example, consider the problem of organizing Wikipedia into a hierarchy.  What's really needed is a Directed Acyclic Graph (DAG).  Sets of linked web pages can represent this kind of structure, but they won't automagically generate diagrams.

- Rich Morin