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| Semantic Version | Legacy Version | Breaking Changes |
|---|---|---|
| 4.4.0 | 202208 | |
| 4.3.0 | 202111 | |
| 4.2.0 | 202001 | |
| 4.1.0 | 201602 | |
| 4.0.0 | 201310 | Scope and formatting specification changes |
| 3.2.1 | 201203 | |
| 3.2.0 | 200806 | |
| 3.1.0 | 200712 | |
| 3.0.0 | 200604 | Definitions of several attributes revised |
| 2.1.0 | 200312 | |
| 2.0.0 | 200210 | Switch from structural to auxiliary According to this page, this version was also referred to as "1.6". |
| 1.0.0 | v1.0 |
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