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Heidelberg Catechism — similarity of two editions
A: Heidelberg: Mayer, 1576
B: Revidierte Ausgabe 1997 (Reformierter Bund)
| Similarity | 73 / 100 (weighted average: structure 20%, wording 70%, spelling 10%) |
|---|---|
| Structure | 96.3 |
| Wording | 65.8 |
| Spelling | 75.4 |
Word-by-word comparison → Read side by side
Structure: 96.3
The average of two figures:
- Units and order: 97.3.
A has 184 units (questions, articles, rejections, and divisions such as
Lord's Days, parts or heads), B has 184; 183 are in both.
Only in A: HC LD 10-b.
Only in B: Lord's Day 16.
4 shared unit(s) stand in a different order. - Form of the shared units: 95.3.
A unit counts as having a different form when one edition's text is less than 80% of the
length of the other's.
Different form: Q 23 (106 vs 216 words); Q 36 (32 vs 42 words); Q 48 (59 vs 145 words); Q 57 (47 vs 32 words); Q 80 (141 vs 233 words); Q 118 (27 vs 35 words).
Wording: 65.8
The share of words the two editions have in common in the units present in both (7334 words in A, 7585 in B), weighted by length. Case, punctuation, Scripture references and spelling variants are ignored: old spellings are levelled before comparing (e.g. u/v, i/j/y, th/t, doubled letters), and long words that differ in only a letter or two count as the same word. This levelling is approximate, so a few spelling variants may still count as different words.
Units with the most different wording:
| Unit | Wording | Spelling |
|---|---|---|
| Q 48 | 33.3 | 76.5 |
| Q 57 | 35.4 | 64.3 |
| Q 121 | 40 | 66.7 |
| Q 36 | 43.2 | 68.8 |
| Q 112 | 44.1 | 62.5 |
| Q 44 | 46.3 | 75 |
| Q 25 | 50 | 77.5 |
| Q 43 | 50.5 | 71.7 |
| Q 102 | 51.1 | 71.7 |
| Q 108 | 51.5 | 67.6 |
| Q 118 | 51.6 | 71.9 |
| Q 16 | 51.9 | 90 |
Spelling: 75.4
Only the words that correspond in both editions count here (4912 pairs), so differences in wording do not lower this score. It is the average of two figures: 60.6% of these words are spelled identically (including capitals), and 90.3% are followed by the same punctuation.
Most frequent spelling differences (A → B):
vnd → und (222×) · vnnd → und (103×) · vns → uns (82×) · deß → des (59×) · auß → aus (23×) · GOtt → Gott (20×) · heiligen → Heiligen (17×) · Gebott → Gebot (16×) · wil → will (16×) · Vatter → Vater (15×) · auff → auf (14×) · er → Er (13×) · wirt → wird (12×) · vnser → unser (12×) · leben → Leben (11×)
Units with the most spelling and punctuation differences: Q 112 (62.5), Q 107 (62.8), Q 109 (64.1), Q 57 (64.3), Q 88 (64.3), Q 104 (64.5), Q 120 (64.9), Q 51 (65). The word-by-word comparison ignores punctuation and capitals, so units that differ only in those do not appear there.
Computed 2026-11-06.