The documentation has this description of naming syntax:
Attribute names can be a combination of alphanumeric characters, colons (
:), periods (
.), and underscores (
Event types (using the
eventTypeattribute) can be a combination of alphanumeric characters, colons (
:), and underscores (
Note that it makes no mention of the hyphen character, but I have found (accidentally) that I can create both event type names and metric categories and names that include hyphens, and that they are found in both Insights and New Relic One.
Is the documentation just offering guidance here, and not defining legal characters for names? Or, is it in need of an update? Are there other unmentioned characters that are also legal?