I've been looking at the Bloom filter implementation in the sandbox area: https://svn.boost.org/trac/boost/browser/sandbox/bloom_filter A previous email thread implied serialization was available, but I don't see it in svn. http://lists.boost.org/Archives/boost/2009/06/152731.php Is the serialization code available somewhere? I've made an attempt at implementing this myself. In doing so I had to implement serialization for boost::dynamic_bitset. The dynamic_bitset serialization code may be useful independent of Bloom filters. The Bloom filter serialization in turn makes use of dynamic_bitset serialization. I've uploaded my implementation to the boost vault: http://www.boostpro.com/vault/index.php?directory=serialization Perhaps I should supply tests, example usage and documentation, but I'm hoping to get advice on Boost best practise before going too far in the wrong direction. I'd like to see dynamic_bitset serialization in Boost proper and bloom_filter serialization alongside the existing code in the sandbox area. Can I request a sandbox account to upload code there? All comments welcomed. Thanks. Paul Fee