|Fail||any||Determines what to return in case of failure.|
|ForceAdd||elt-alg^boo||Default: FALSE, indicate you want to add or replace existing documentation.|
Add documentation given by `r' to global documentation hash table.
The documentation in `r' is blown up and checked. Then it is tried to be added with a dry operation (DryReplaceOrAdd) and thus overwrites existing documentation iff the hash value computed by `r' is already in the global dry, and is appended otherwise.