:original_name: waf_02_0086.html

.. _waf_02_0086:

Character Set Specifications
============================

-  Character Set Specifications for Key

   The key cannot be left blank or be an empty string.

   -  In Deutsche Telekom, a tag key can contain uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and sign @.
   -  In other environments, a tag key cannot contain the following characters: ASCII (0-31), equal signs (=), asterisks (*), left angle brackets (<), right angle brackets (>), backslashes (\\), commas (,), vertical bars (|), and slashes (/).

-  Character Set Specifications for Value

   The value cannot be left blank but can be an empty string.

   -  In Deutsche Telekom, a tag value can contain uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_).
   -  In other environments, a tag value cannot contain the following characters: ASCII (0-31), equal signs (=), asterisks (*), left angle brackets (<), right angle brackets (>), backslashes (\\), commas (,), vertical bars (|), and slashes (/).