(2021-04-15) ・Added an Introduction ・In \S 1.3, added "(UndIg)", as well as a reference to "(Undig)" in \S 2.1 ・Rewrote various portions of \S 1.5 ・Rewrote Example 2.4.4 ・Modified the title of Example 2.4.5 ・Added Example 2.4.6 ・Slightly modified the paragraph at the beginning of \S 3 ・Slightly modified the final portion of \S 3.1 concerning (FxRng), (FxEuc), (FxFld) ・Added Example 3.9.1 and made slight modifications to the surrounding text ・In \S 3.10, rewrote the discussion preceding (Stp1) ・In \S 3.11, slightly modified the discussion following ({\Theta}ORInd) (2021-04-18) ・Added item (iv) to Example 2.4.6 ・Made slight modifications to (AND(XOR)-Chn1) and (AND(XOR)-Chn2) in \S 3.10 (2021-04-25) ・Slightly modified the final portions of (Stp7), (Stp8) ・Slightly modified the text immediately following (DltLb) (2021-05-27) ・Slightly modified the Introduction ・In \S 1.3, \S 1.8, added references to Example 2.4.5 ・In \S 1.5, added a reference to \S 1.10 ・Added \S 1.10 ・Added items (iv), (v), (vi), (vii), (viii) to Example 2.4.5 ・Rewrote the introductory portion of Example 3.5.2 ・In \S 3.6, slightly modified (Syp2) ・Slightly modified the discussion of "numerous classical constructions" at the end of \S 3.8 ・Slightly modified the discussion surrounding Example 3.9.1 ・In \S 3.10, slightly modified the discussion of (Stp1), (Stp2), (Stp3), (Stp7), (Stp8) ・At the end of \S 3.10, added a supplementary explanation of the term "closed loop" ・In \S 3.11, corrected a slight inaccuracy in the wording of (Ind3>1+2) ・In \S 3.11, added a paragraph concerning the qualitative similarity of (ExtInd2) to (logORInd), ($\Theta$ORInd) ・Slightly modified the discussion surrounding (RcnLb) in \S 3.11 (2021-06-04) ・In \S 1.10, slightly modified the wording of (Pyth4) ・Added a supplementary explanation to the discussion of crystals in \S 3.5 ・Added item (v) to Example 3.5.2 ・Slightly modified the wording of (AND(XOR)-Chn1) in \S 3.10 (2021-06-18) ・Added \S 1.11, together with a reference to \S 1.11 in the Introduction ・Rewrote portions of Example 2.4.5, (v), (vi), (viii) (2021-08-30) ・Added a discussion of [EMSCOP] to \S 1.3, together with a reference to this discussion in \S 1.5  and a bibliographical entry for [EMSCOP] ・Slightly modified the final portions of \S 1.6, \S 1.7 ・Added Example 2.4.7 (together with introductory text immediately preceding Example 2.4.7) and made corresponding modifications to the Introduction and throughout the paper (essentially in the context of certain of the references to Example 2.4.5) ・Slightly modified the discussion immediately preceding Example 3.1.1 ・Added Example 3.1.1, together with various references to Example 3.1.1 throughout the paper ・Slightly modified the title of \S 3.5, as well as the title and introductory portion of Example 3.5.2 ・Slightly modified the beginning of Example 3.5.1 ・Slightly modified the final portion of Example 3.5.2, (i) ・Slightly modified the title of Example 3.8.1 ・Added Example 3.8.2, together with various references to Example 3.8.2 throughout the paper ・Slightly modified the discussion immediately following Example 3.8.2 (2021-12-08) ・Added Acknowledgements ・Slightly modified the final portion of \S 1.1 and added an entry for [ExpEst] to the list of references ・Added items (v), (vi), (vii), (viii) (and corrected a misprint in item (iii)) to Example 3.3.2 ・Corrected various misprints involving "double underlined q" in \S 3.4, \S 3.5 ・Slightly modified the discussion preceding Example 3.8.1 ・Added Examples 3.8.3, 3.8.4 ・Slightly modified the discussion following Example 3.8.4 ・In \S 3.11, slightly modified the discussion immediately preceding (Di/NDi) ・In \S 3.11, slightly modified the wording of (GluDt) (2022-01-14) ・Added a list of examples following the table of contents ・Slightly modified the discussion at the end of \S 3.2 and added Example 3.2.1, together with  various references to Example 3.2.1 throughout the paper ・Added references [FC], [HASurI], [GenEll], and [Mumf2] (2022-03-20) ・Slightly modified the discussion immediately preceding Example 3.2.1 ・Added Example 3.2.2, as well as various references to Example 3.2.2 throughout the paper ・Slightly modified the notation of Example 3.5.1, (ii), (iii)