Tag Character Set Specifications

Character Set Specifications for Keys

A tag key:
  • Cannot be an empty string.

  • Must be unique for each resource.

  • Can contain a maximum of 128 characters.

  • Cannot start or end with a space, or start with _sys_. Only letters, digits, spaces, and the following special characters are allowed: _.:=+-@

Character Set Specifications for Values

A tag value:

  • Can be an empty string.

  • Can contain a maximum of 255 characters.

  • Can contain letters, digits, spaces, and the following special characters: _.:/=+-@

Parent topic: Tags