The TEI Guidelines offer two options for encoding textual divisions:
numbered divisions: <div0>, <div1>, <div2>, and so forth, which are used to indicate different levels of division within the text
unnumbered divisions: <div>
These should not be confused with the use of the n= attribute on <div>, which is used to record the numbering of individual sequences of <div> elements.
The WWP uses unnumbered <div>s.