We discussed this issue in a FastDownward meeting.
The result is that the aaai and springer URLs should become part of issue1200 and it should reference something more reliable for example the DOI of the paper.

For the other links the majority was in favor of keeping it as is, keeping the downward-markdown private, and the ibm and microsoft links should be updated in the case someone actually wants to read them and actually figures out where they should have linked.

With that the issue is resolved.

How should we deal with these URLs?

For GNU we could link to the waybackmachine e.g.:
https://web.archive.org/web/20260405013314/http://www.gnu.org/licenses/why-not-lgpl.html

I am not sure if CHANGES.md should itself change over time (besides prepending new changes). If no we could do it once to link to the waybackmachine otherwise we could just update them to the new URLs were the corresponding content is now. However, the uncrustify part is actually gone (but archived with https://web.archive.org/web/20230929033038/https://www.fast-downward.org/ForDevelopers/Uncrustify )

I think the aaai and springer URLs are part of issue1200.

For the downward-markdown repo we could make just make it public. Is there are reason not to?

For the ibm and microsoft links we should figure out what the new URL for the content is.

For the URLs inside the svg file we could just live with it I think.

Some URLs in the repo are outdated, not public or otherwise disappointing.

I found these problematic URLs:

in README.md, LICENCE.md
https://www.gnu.org/licenses/
https://www.gnu.org/licenses/why-not-lgpl.html



in CHANGES.md :
https://www.fast-downward.org/Doc/ConstraintGenerator#Delete_relaxation_constraints_from_Rankooh_and_Rintanen
https://www.fast-downward.org/ForDevelopers/Blog/TheNewOptionParser
https://www.fast-downward.org/ForDevelopers/Uncrustify
https://www.fast-downward.org/ForDevelopers/Blog/LogoDesigns
https://www.fast-downward.org/Doc/ConstraintGenerator#Delete_relaxation_constraints
https://www.fast-downward.org/ForDevelopers/Blog/ADeeperLookAtStates
https://www.fast-downward.org/QuickStart
https://www.fast-downward.org/Doc/PruningMethod
https://www.fast-downward.org/Doc/MergeStrategy
https://www.fast-downward.org/LPBuildInstructions


in .github/workflows/misc/cplex2211_windows_installer.properties :
https://www.ibm.com/support/knowledgecenter/SSSA5P_12.9.0/ilog.odms.studio.help/Optimization_Studio/topics/td_silent_install.html


src/search/open_lists/epsilon_greedy_open_list.cc
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS14/paper/view/7943/8066

src/search/open_lists/type_based_open_list.cc
http://www.aaai.org/ocs/index.php/AAAI/AAAI14/paper/view/8472/8705

src/search/pdbs/pattern_collection_generator_genetic.cc
http://www.springerlink.com/content/20613345434608x1/

src/search/operator_counting/operator_counting_heuristic.cc
src/search/operator_counting/state_equation_constraints.cc
src/search/operator_counting/lm_cut_constraints.cc
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS14/paper/view/7892/8031

src/search/landmarks/landmark_sum_heuristic.cc
http://www.aaai.org/Papers/JAIR/Vol39/JAIR-3903.pdf

src/search/pruning/stubborn_sets_ec.cc
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS13/paper/view/6053/6185

src/search/pruning/stubborn_sets_simple.cc
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS14/paper/view/7922/8042

src/search/utils/system_windows.h
http://support.microsoft.com/kb/143208
https://support.microsoft.com/de-ch/kb/166474

misc/website/README.md
https://github.com/aibasel/downward-markdown

misc/images/fast-downward.svg
http://www.inkscape.org/
http://www.inkscape.org/namespaces/inkscape
http://www.openswatchbook.org/uri/2009/osb
http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd