Folders, Tags, Events and Beans all include a Label portion. The Label portion is the part that specifies the name of the element. For example: the tag #omg, the Label portion is omg.
The Label portion can be any alphabetic character, currency character, or emoji followed by up to 18 alpha-numeric characters, currency characters or emoji characters. The Label portion can also be any quoted text.
That all might sound complicated, but it's pretty intuitive.
Here are some valid Tags:
#hello#$-bills#"Monkey Boogers"#a1-sup3r-4w3s0m3
And here are some invalid tags:
#000#-OK#_hello_#Monkey BoogersNote: this would register as the Tag#monkey
A couple other important notes on labels:
- All non-quoted text labels will be converted to lower case
- Quoted text, once captured will be rendered without the quotes