---
title: "Schematron"
source: https://dev.pageseeder.com/reference/glossary/schematron.html
description: "Schematron is an ISO standard offering robust XML validation with customizable error messages. PageSeeder supports Schematron for document validation through PSML Schematron, sample code, and validation tools."
last_updated: 2026-08-11T16:38:21+10:00
tokens: ~146
---

# Schematron

An ISO standard with powerful validation capabilities and configurable error messages. Further information about the standard is available via the [Schematron Wikipedia page](https://en.wikipedia.org/wiki/Schematron). *Also see* [XSD files](/reference/glossary/xsd_files.md).

Information regarding support for Schematron in PageSeeder can be found in the following:

- [PSML Schematron](/guide/configuration/psml/psml_schematron.md)
- [Sample code](/reference/sample_code/schematron.md)
- [Validating documents](/guide/documents/validating_pageseeder_documents.md).