・Slightly modified the notation ("underline v" ---> "underline w") used to denote a \Theta-Hodge theater (so as to avoid  confusion) that appears at the beginning of Propositions 3.3, 4.2, 4.4 ・Slightly modified the phrasing of the explanation preceding the first display of Proposition 3.3, (i) ・Corrected a misprint ("submonoid of the" ---> "submonoid") in the discussion between the second and third displays  of Corollary 3.5, (ii) ・Slightly reworded the phrasing ("the two distinct elements of E" ---> "the two distinct subscripted labels")  between the second and third displays of Remark 3.5.2, (i) ・Added a supplementary explanatory phrase ("i.e., from \'etale-like objects") to the discussion at the beginning of  Remark 3.6.2, (i) ・Added a supplementary explanatory remark (Remark 4.5.4), together with a reference to this remark in Corollary 4.5, (v)