Regular expressions

In ENA, attributes values in which you can free type also allow entry of regular expressions (Regex). When defining filter rules with regular expression, note that pattern matching is case-sensitive.

Examples:

• a name that includes lon:
  

  lon

• a name that starts with lon:
  

  ^lon

• a name that starts with either lon or par:
  

  ^((lon)|(par))

• a name that ends in 1:
  

  1$

• a name that ends in a, b or c:
  

  [abc]$

• a name that contains at least one digit:
  

  [0-9]

• a name that include s, t, u or v:
  

  [!s-v]

• a name that include a pair of digits next to each other:
  

  [0-9]{2}

• a name that has x as the fourth character:
  

  ^…x

• 1 or more special characters (metacharacters) in their name require that the character is escaped. For example,  a name with a plus sign is escaped using the backslash:
  

  eol\+us

This example filter excludes all devices that include bvt in their name:
^((?!bvt).)*$