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Co-constraints Scorecard
| Language Feature | DTDs | RELAX NG | Schematron | W3C XML Schemas |
|---|---|---|---|---|
| Sibling content | No | Yes | Yes | No |
| Sibling attribute values | No | No | Yes | No |
| Mutual exclusion | No | Yes | Yes | No |
| Element type from attribute presence | No | Yes | Yes | No |
| Element type from attribute content | No | Yes | Yes | No |
| Attribute type from element content | No | Yes | Yes | No |
| Attribute value exclusion | No | No | Yes | No |