Form Element Attribute - novalidate, method, action
This is how the form will process the data inputed into it and return it to the user. Novalidate is a true/false method confirming that the data was input using the correct format. Action is the process of the form submitting and method is the method of submitting the form. Examples of method are POST and GET.
Form Elements - fieldset and legend
Fieldset is used to group several controls and labels into the form. Legend is a descendant of the fieldset and is an element that represents a caption for the content.
Form Element - label and how to use attributes: for and id
The label element represents a caption for an item in the form. For and ID attributes are used for control of the label.
Summary
There is a lot that goes into both setting up and stylinig forms. For proper submission you need to make sure all elements and attributes are set up properly