Perhaps relaxing the understandability requirement in favor of searchability would work.
- [O] Extending org-contacts with properties: naming propert... Karl Voit
- Re: [O] Extending org-contacts with properties: namin... Samuel Wales
- Re: [O] Extending org-contacts with properties: n... David Rogers
- Re: [O] Extending org-contacts with propertie... Samuel Wales
- Re: [O] Extending org-contacts with propertie... Karl Voit
- Re: [O] Extending org-contacts with prope... Robert Horn
- Re: [O] Extending org-contacts with ... Karl Voit
- Re: [O] Extending org-contacts with prope... Eric Abrahamsen
- Re: [O] Extending org-contacts with ... Karl Voit
