Several button types are available in cf_sebField. They all use the "label" attribute for the button text (to be consistent with other field types).
For combination buttons (those with "/" in the type), the "label" attribute should be comma delimited for each subtype.
The "submit/cancel/delete" type will be changed to "submit/cancel" if the "deletable" attribute (which defaults to the value of the "isDeletable" attribute of cf_sebForm is false or the name of a column with a value of false.
Use the "name" attribute to have it send (with the "label" attribute as its value) as a form field.