# Tag Naming, Characters not allowed

**URL:** <https://forum.inductiveautomation.com/t/tag-naming-characters-not-allowed/53840>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [December 7, 2021, 3:31pm UTC](https://forum.inductiveautomation.com/t/tag-naming-characters-not-allowed/53840 "2021-12-07T15:31:46Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [December 8, 2021, 2:46pm UTC](https://forum.inductiveautomation.com/t/tag-naming-characters-not-allowed/53840/12 "2021-12-08T14:46:13Z")

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The tag naming is ultimately enforced via regular expression that looks for characters in the unicode letter categories (`p{\L}`), which unfortunately means multi-byte character sequences that contain a letter and then characters in a non-letter unicode category (u0e35 and u0e48 are both “nonspacing mark”) will not match the regex and therefore not be considered a valid tag name.

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