1、The sample program can read individual messages, or the Berkeley "mbox" format.
2、mbox and ibox are used to read data written to the SPU mailbox write channels and have slightly different semantics.
3、M Benn is not a query solution, because he has neither a foaf: mbox or a foaf: mbox_sha1sum property.
4、For merging FOAF descriptions to continue to work, processing agents must instead merge on the mbox_sha1sum property, and dynamically compute sums for cases where they only know the mbox property.
5、为了合并FOAF描述以继续工作，处理代理必须转而根据 mbox_sha1sum特*合并，并当它们仅知道mbox特*的情况时动态地计算FOAF 描述的总和。
