[boost] Is "+" safe for file names?

Just noticed this directory name: libs/filesystem/test/vc++.boost.filesystem Is "+" safe to use across file systems? Hm, actually I'm fairly sure more than one "." is not safe. For example in the MVS systems? -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org (msn) - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim,yahoo,skype,efnet,gmail