Init_prop.thy
2013-05-30 chunhan co2sobj simpset
2013-05-21 chunhan update
2013-05-15 chunhan finally get cf2sfile path property done
2013-05-15 chunhan remove duplicated pre-condition of current_files in OS_grant, since it is property if is_file/is_dir.
2013-05-09 chunhan fixed bugs in deleted definition
2013-05-05 chunhan fixed bugs in def of cf2sfile
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