Boost User list: I have a question about boost::serialization and portability. When I read in the overview for this feature at http://www.boost.org/libs/serialization/doc/overview.html point 7 states that "Data Portability - Streams of bytes created on one platform should be readable on any other". I'm trying to clear up how far portability goes. I've tested serialization on two different hardware platforms (Intel Linux with Boost 1.34.1 and Sparc Solaris with Boost 1.33.1) which have different endians. The archiving writes and reads fine as long as the reading is done on the newer or equal version of Boost. Basically I wrote a serialization file with boost::archive::text_oarchive on the Solaris box and ftped the file to the Linux host and read it in fine. But going the other way (1.34.1 -> 1.33.1) aborted which is understandable because a archive version level change (3 vs 4) existed between those. So is readability assured by serialization as long as you're going from an older or equal version of boost? We can handle our maintaining the very latest boost version in our code and customers would send us their archives for testing and they'd either have the same or older version of boost in their copy. Their code would never be newer than ours. If this is obeyed will their archives always be readable by our code? Mark