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XSD

Q: What does XSD stand for?

XSD stands for XML Schema Definition. The modern schema language: written in XML itself, namespace-aware, and able to declare that a value must be a date or a bounded number.

The modern schema language: written in XML itself, namespace-aware, and able to declare that a value must be a date or a bounded number.

Definition

What XSD Means

XSD stands for

XML Schema Definition

XSD fixed what DTDs could not do. It is typed, so an attribute can be declared a date, an integer within bounds, or a string matching a pattern, and validation catches errors a DTD would pass.

Grammar, types and rules are three separate layers of enforcement. A schema says what may appear; something like Schematron says what your project actually permits.

Also written: XML Schema, xml schema definition

Nearby

Related Terms

DTD

The older grammar mechanism declaring which elements and attributes a document may contain, inherited from SGML and still cited by contracts.

XML

The markup format underneath most modern documentation standards, where structure is explicit and can be validated against a schema.

Schematron

A rule-based validation language that checks relationships and project policy a schema cannot express, such as cross-element conditions.

BREX

The data module that encodes a project's S1000D business rules in machine-checkable form, so conformance can be validated rather than reviewed by eye.

All 64 terms in the glossary

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