Some of this acronyms come from afar, some others are a subproduct of the discussions on the forum where we used them as a shorthand. As you will see C1 and C2 refer to the existing editions... I grouped the terms by topics. I think there will be no issue in adding a glossary as you suggest. In any case, I hope this post helps!
Regarding a PDF rulebook repository, you may find one on the German forum with almost any rules available in various languages:
https://www.carcassonne-forum.de/viewforum.php?f=14Here you are the definitions:
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Edition names and artwork versions:*
C1 stands for Carcassonne I, the old edition of Carcassonne. The artwork is by Doris Matthäus.
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C2 stands for Carcassonne II, the new edition of Carcassonne. The artwork is by Anne Pätzke.
In this edition we may some districtions regarding the art work:
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C2.0, that represents the initial artwork featuring cities with dark ebackground (2014-2016)
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C2.1, that represents an updated version of the artwork common to us all featuring cities with lighter backgrounds (2016-2020)
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C2.2, that represents a new update with buildings overflowing the city edges and some more detail (2020-). We are still discussing if C2.2 should be considered C3
You may find some additional info about these visual changes here:
https://wikicarpedia.com/index.php/Visual_Changes_in_the_2nd_Edition*
C3 stands for Carcassonne III, the new new editon if Hans-im-Glück confirms it is a completely new edition. The artwork is by Marcel Gröber based on the previous work by Anne Pätzke.
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Pros: - Tile references in Big Box v3.0 or 2021 (not annouced officially but on sale in some countries) lists all tiles with a code starting with V3.
- Carcassonne v3.0 and Big Box v3.0 include a nuew version of the river source (with a road) and th river lake (with a monastery), different from those tiles in C1 and C2.
- Rules add some tiny wording changes and the manuals follow a new design.
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Cons: - Hans-im-Glück and other publishers are not preparing a proper launch campaign. They are releasing the new versions as revamped reprints in a updated style.
- No real backwards compatibility issues exist with previous C2 releases.
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WD or Winter Edition Download Version, which was only available for download until the official boxed edition was relesead in 2012. The artwork is by Doris Matthäus and looks like a snowy version of C1. Some people didn't like how snowed fields looked like. See here:
https://wikicarpedia.com/index.php/Variants#Winter_Digital_Download*
WE stands for the regular Winter Edition released in 2012 ans later re-released in 2020 including river tiles. The artwork is by Anne Pätzke and looks closer to C2. The tile distribution includes 12 additional without additional rules featuring animals.
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Rules and clarification guides:*
CAR: is short for the Carcassonne Complete Annotated Rules document that served as a backbone for this forum. The last update was version v7.4 from 22/05/2015 which missed the last C1 expansions (Cathedrals in Germany and The Labyrinth) and the clarifications from 10/2015 and 4/2016 covering long debated issues like interactions with Halflings and double-sized tiles when combined with other expansions. Regarding C2 it only covers The Abbot and some clarifications affecting it.
The CAR v7.4 is available here:
http://www.carcassonnecentral.com/community/index.php?action=downloads;sa=view;down=292*
WICA: short for WikiCarpedia. It is an online version of the CAR that used it as source material and added all the available clarifications since then. The project started in summer 2018. It covers C1, C2/C3, WD/WE and other Carcassonne spin-offs (not all of them fully developed). It keeps C1 and C2/C3 rules separated due to the differences beween editions.
WICA is available here:
https://wikicarpedia.com
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Rules sets:*
C1 Rules (2000-2016) refers to the rules of the old edition plus all the official clarifications relased for it.
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C2 Rules (2014-) refers to the rules of the new edition plus all the official clarifications released from 2020-2021. Some of these clarifications override previous official ones for C1.
Notable differences:
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C1 rules: -
Exp. 5 - Abbey & Mayor: - The wagon moves to a valid feature connected by roads at any distance or by common edges (e.g. city to adjacent abbey).
- At the end of the game, before final scoring, players may enjoy an extra round to place the remaining abbey tiles.
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Exp. 6 - Count, King & Robber: - Before final scoring, players may redeploy all their meeples in Carcassonne to roads, cities, monasteries and fields.
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Mini #2 - The Messages: - There may be up to 6 rounds of scoring during the turn sequence where players may receive messages.
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Halflings: - Triangular tiles are counted individually during scoring.
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Double-sized tiles (Castles in Germany):
- Double-sized tiles are counted individually during scoring.
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The Abbot (aligned with the C1 rounds of scoring):
- The abbot is removed and scored immediately in
2. Placing a meeple.
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C2 rules: -
Exp. 5 - Abbey & Mayor: - The wagon moves to a valid feature on the same or on an adjacent tile after scoring.
- At the end of the game, before final scoring, players may not enjoy an extra round to place the remaining abbey tiles.
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Exp. 6 - Count, King & Robber: - Before final scoring, players may redeploy all their meeples in Carcassonne only to fields.
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Mini #2 - The Messages: - There is only 1 rounds of scoring during the turn sequence so players receive messages only at the end of their turn.
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Halflings: - Triangular tiles are not counted individually during scoring. Scoring considers occupied spaces, so two triangular tiles sharing a space are counted as one tile/occupied square spaces.
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Double-sized tiles (Castles in German, Markets of Leipzig, 20th Anniversary River):
- Double-sized tiles are not counted individually during scoring. Scoring considers occupied spaces, so in certain scenarios a double-sized scenario may count as two tiles/ocuppied square spaces.
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The Abbot (aligned with the C2 round2 of scoring):
- The abbot is removed in
2. Placing a meeple but scored in
3. Scoring a feature as per the 20th Anniversary Edition rules/Carcassonne v3.0/Big Box v3.0/2021.
You can find more information on ruleset changes here:
https://wikicarpedia.com/index.php/Summary_of_Rule_Sets_%26_Changes
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Publishers:
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HiG stands for Hans-im-Glück, the original publisher of Carcassonne and its spin-offs based in Germany.
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RGG stands for Rio Grande Games, the first publisher releasing Carcassonne in English under license (2000-2012). They included a number of trnaslation mistakes in the rules translations. Notorious cases affect the fairy in the dragon in their translations (you can see the overwhelming number of clarifications in Exp. 3 because of this):
- The wording delayed the movement of the dragon after scoring although the turn sequences maintained the official turn sequence.
- The fairy was assigned to all the meeples on its tile... affecting multiple meeples during scoring.
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ZMG stands for Z-Man Games, the current publisher releasing Carcassonne in English under license (2012-). They included a number of trnaslation mistakes in the rules translations. Notorious cases affect the fairy maintaning the error by RGG in C1 (you can see the overwhelming number of clarifications in Exp. 3 because of this) and a numerous mistakes scattered all over Big Box 6 in C2.
You can find more information on mistaken rules in C2 here:
https://wikicarpedia.com/index.php/Summary_of_Rule_Sets_%26_Changes
Big Boxes:*
BB1, BB2, BB3, BB4, BB5, BB6, BB7 stand for Big Box 1... Big Box 7 respectively, following the chronological order of their release. Not all them were publised in all licensed published, BB4 and newer ones are the most common.
Here you can find more info about them, including the expansions included in each of them:
https://wikicarpedia.com/index.php/Variants#Big_Boxes
After reading this, you may find interesting to re-read my comments about the dragon rules across editions and publishers.
Have fun!
EDIT: Added some extra info in the intro part.