| Undetermined or disputed: | Low: | Medium: | High: |
|---|---|---|---|
| Either more research is needed, or it is disputed | Fail in a very significant way such as claiming their own copyright without including a GFDL notice | Make some effort towards complying with our licence, but fail to do so in some significant way | Either comply, or come close to complying with our licence |
There is also the category "Former content users" for sites that at one time used Wikipedia content, but no longer do. This should be periodically checked.
Also note that problematic sites sometimes get listed on the mirror list without ending up here. So check the mirror list too: (Numbers) ABC DEF GHI JKL MNO PQR STU VWXYZ