The form definition is made in YAML, which is a simple structured markup language. A _template may have a single form. The form starts and ends with [[form]] and [[/form]] as for code blocks. Within those tags, we describe the form using YAML:
[[form]] fields: # This is always required at the start name-of-the-field: # Use a valid YAML name (i.e not starting with a number) label: Label # This is what the user sees when using the form type: type-of-field # The field types property: value... # Depending on the field type [[/form]]
The default field type is 'text', unless you specify one or more values, in which case it defaults to 'select'.
Always start name of the field form with a letter. Field names starting with a digit or some other character are invalid. In case of special YAML symbols like true, false, yes, no, you may need to surround those with simple quote signs like this: "yes".