Zabbix 6.0 introduced a tag policy for templates. Even though it's publicly available in the template configuration guidelines it is kind of hard to find (see conventions for templates, items, and triggers) because it's not linked from the tag-related pages in the manual (or at least I wasn't able to find it). We should make the policy more noticeable by:

• linking to it from the manual
• changing all our tag examples to the ones that do not violate this policy

The latter will require more efforts because of the screenshots.