You can clone with
HTTPS or Subversion.
Must be documented what it does when value not present in cache.
regarding increment - if ironcache doesn't have the key, it'll be created
am using redis INCR and INCRBY and Set ADD (SADD) commands for my proj
and its value will be equal to the increment value you passed (in case of absence)
any hints on building sets of info such as FOAF
regarding sets - lemme check