The Tigris site will receive a major upgrade the evening of Monday, December 1, beginning at 8:30 pm PST. Downtime is projected to be about ten hours.
Further details in the announcement
F.4. Requirements On Modified Works
All modified versions of documents covered by this license,
including translations, anthologies, compilations and partial documents,
must meet the following requirements:
The modified version must be labeled as such.
The person making the modifications must be identified and the
modifications dated.
Acknowledgement of the original author and publisher if
applicable must be retained according to normal academic citation
practices.
The location of the original unmodified document must be
identified.
The original author's (or authors') name(s) may not be used to
assert or imply endorsement of the resulting document without the
original author's (or authors') permission.