Possible operators are :

• = : equals
• contains or LIKE: contains (with or without the exact accents)
• match : equals but with or without the exact accents
• matchagainst : same as contains, but using the MySQL fulltext index feature (faster).
• not contains
• starts-with
  (only for strings)
• ends-with
• > ou GT : greater than
• >= ou GT= : greater or equal
• < ou LT : lower than
• <= ou LT= : lower or equal
• NE ou != ou <> : different
• between: between 2 values (the two values are separated by a slash "/" )
• IN: in a set of values (values are separated by commas "," )
• NOT IN : not in the set of values given (values are separated by commas "," )
• MD5 : a MD5 of the value encoded in Nectil is equal to the value given for the field (can be used to hide values from user).

Default operators are :

• equals (=) for numbers and dates
• contains for strings

Strings handled as numbers :

If you have text fields that contains numbers you better use the operator modifier "number" because when considered as a string "989" is lower than "99" (alphabetical order).

<SEARCH>
  <MEDIA>
    <DESCRIPTION>
      <HEADER operator="LT number">100</HEADER>
    </DESCRIPTION>
  </MEDIA>
</SEARCH>

The "number" modifier must be appended at the end of the standard operator (=, GT, LT, etc) after a whitespace.