crystal-facet-uml(1) on Linux
The text 610ff8f2b659, as Debian 12 (Bookworm) shipped it.
creates a set of uml diagrams. crystal-facet-uml ensures consistency of relationships and uml element names between different diagrams. crystal-facet-uml exports diagrams in various vector and pixel-based image formats.
Flags it lists
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-e -
-h -
-i -
-r -
-t -
-u -
-v