An MD5 file such as 20180101md5.txt is made of:

- first line: its creation date as YYYY-MM-DD HH:MM:SS UTC+HHMM with:
  . YYYY: year
  . MM: month
  . DD: day
  . HH: hours
  . MM: minutes
  . SS: seconds
  . UTC+HHMM: timezone, i.e. UTC+0200 (Universal Time + 2 hours for Central Europe Summer Time) or UTC+0100 (for CE Winter Time)

- one additional line per downloadable file made of:
  . the file MD5 checksum (32 characters)
  . 2 space characters
  . the file name

Under Linux, an easy way to check if your local file (e.g. EN_ipc_scheme_20180101.xml) is the same as the one stored on WIPO site is to run these two commands and to verify that their output are the same:

md5sum EN_ipc_scheme_20180101.xml

curl -s http://www.wipo.int/ipc/itos4ipc/ITSupport_and_download_area/20180101/20180101md5.txt | grep EN_ipc_scheme_20180101.xml