> For the complete documentation index, see [llms.txt](https://docs.onetone.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onetone.ai/core-features-in-a-nutshell/communication-monitoring/events/blank-entities.md).

# Blank Entities

Placeholders or wildcards that are commonly part of a template or just temporarily pasted to be rewritten in the future. They are ok in the email concept but an agent should never forget to replace such blank expressions with a value before sending the email.

For now, the only recognized blank entity is the generated wildcard by Onetone (\_\_NAME\_\_, etc.).