# XML Schema 1.0

Source: https://xmlvalid.com/schemas/xsd-1.0

> Check an .xsd file itself against the W3C schema for schemas.

The schema for schemas describes the XML of an XSD document: which xs: elements exist and where they may appear.

- Type: XSD
- Version: 1.0 (second edition)
- Namespace: `http://www.w3.org/2001/XMLSchema`
- Root element: `schema`
- Publisher: W3C (W3C Software and Document License), source: https://www.w3.org/2001/XMLSchema.xsd
- Validate against it: https://xmlvalid.com/validate?schema=xsd-1.0

## Notes

- This catches structural mistakes only. References to undefined types, duplicate names and other constraints are found when the schema is compiled: choose your .xsd as the schema in the validator to see those errors.
- The example is by xmlvalid.com.