illumos gate

The 'offline' and 'sparse' extended system attributes should be documented in the ls(1) man page:

# /usr/bin/ls -/c a
-rw-r--r--   1 root     root           0 mar  3 04:30 a
                {----------Os}
# /usr/bin/ls -/v a
-rw-r--r--   1 root     root           0 mar  3 04:30 a
                {noarchive,nohidden,noreadonly,nosystem,noappendonly,nonodump,noimmutable,noav_modified,noav_quarantined,nonounlink,offline,sparse}
#

User Commands                                               LS(1)

     The display characters used in compact mode (-/  c)  are  as
     follows:

       Attribute Name     Display
       archive            A
       hidden             H
       readonly           R
       system             S
       appendonly         a
       nodump             d
       immutable          i
       av_modified        m
       av_quarantined     q
       nounlink           u

     The display in verbose mode (/ v) uses full attribute  names
     when  it is set and the name prefixed by 'no' when it is not
     set.