ISO/IEC 19757-3:2025

Information technology — Document Schema Definition Languages (DSDL) — Part 3: Rule-based validation using Schematron

This document specifies Schematron, a schema language for XML. This document establishes requirements for Schematron schemas and specifies when an XML document matches the patterns specified by a Schematron schema. Schematron uses query languages such as XPath for writing assertions.

Technologies de l'information — Langages de définition de schéma de documents (DSDL) — Partie 3: Validation basée sur des règles à l'aide de Schematron

General Information

• Status: Published
• Publication Date: 28-Sep-2025
• ICS: 35.240.30 - IT applications in information, documentation and publishing
• Technical Committee: ISO/IEC JTC 1/SC 34 - Document description and processing languages
• Drafting Committee: ISO/IEC JTC 1/SC 34 - Document description and processing languages
• Current Stage: 6060 - International Standard published
• Start Date: 29-Sep-2025
• Due Date: 16-Sep-2025
• Completion Date: 29-Sep-2025

Standards Content (Sample)

International
Standard
ISO/IEC 19757-3
Fourth edition
Information technology —
2025-09
Document Schema Definition
Languages (DSDL) —
Part 3:
Rule-based validation using
Schematron
Technologies de l'information — Langages de définition de
schéma de documents (DSDL) —
Partie 3: Validation basée sur des règles à l'aide de Schematron
Reference number
© ISO/IEC 2025
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Published in Switzerland
© ISO/IEC 2025 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Notation . 4
5 Syntax . 4
5.1 Well-formedness .4
5.2 Namespace .4
5.3 Whitespace .4
5.4 Core elements .5
5.4.1 General .5
5.4.2 active element .5
5.4.3 assert element .5
5.4.4 extends element .5
5.4.5 group element .6
5.4.6 include element .6
5.4.7 let element .6
5.4.8 library element .6
5.4.9 name element .6
5.4.10 ns element .6
5.4.11 param element .7
5.4.12 pattern element .7
5.4.13 phase element .7
5.4.14 report element .8
5.4.15 rule element .8
5.4.16 rules element .8
5.4.17 schema element .8
5.4.18 value-of element .9
5.5 Ancillary elements and attributes .9
5.5.1 diagnostic element .9
5.5.2 diagnostics attribute . .9
5.5.3 diagnostics element .9
5.5.4 dir element .9
5.5.5 emph element .9
5.5.6 flag attribute .9
5.5.7 from attribute .10
5.5.8 fpi attribute .10
5.5.9 icon attribute .10
5.5.10 p element .10
5.5.11 properties attribute.10
5.5.12 properties element .10
5.5.13 property element .10
5.5.14 role attribute .11
5.5.15 schematronEdition attribute .11
5.5.16 severity attribute .11
5.5.17 see attribute .11
5.5.18 span element .11
5.5.19 subject attribute .11
5.5.20 title element . 12
5.5.21 visit-each attribute. 12
5.5.22 when attribute . 12
6 Semantics .12

© ISO/IEC 2025 – All rights reserved
iii
6.1 Validation function . 12
6.2 Minimal syntax. 13
6.3 Processing model . 13
6.4 Abstract pattern processing . .14
6.5 Query language binding .16
6.6 Order and side-effects .16
6.7 Localization and language fixup .17
6.8 Base URI fixup .17
7 Conformance . 17
7.1 Simple conformance .17
7.2 Full conformance .17
Annex A (normative) RELAX NG schema for Schematron . 19
Annex B (normative) Schematron schema for additional constraints .
...