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Namespaces Scorecard
| Language Feature | DTDs | RELAX NG | Schematron | W3C XML Schemas |
|---|---|---|---|---|
| Namespace support | Some[a] | Yes | Yes | Yes |
| Explicit namespaces | Some[a] | Yes | Yes | Yes |
| Any namespace | No | Yes | Yes | Yes |
| Any namespace (XSL) | No | Yes | Yes | No |
| Any namespace (nesting) | No | Yes | Yes | Yes |
|
[a] Namespace prefixes are fixed on a per-document basis at best. |
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