Xml-tools.com - Powerful XML tools. Topologi. Tutorials on Schematron. Introduction Schematron is an XML-based language for validating XML instance documents. Schematron is used to make assertions about data in an XML document. Schematron is used to express operational and business rules. Schematron is an ISO standard. Use Schematron to verify data interdependencies (co-constraints), check data cardinality, and perform algorithmic checks. Invitation to Contribute These tutorials teach the core concepts of Schematron. Acknowledgements I would like to thank George Cristian Bina for reviewing these tutorials.
Improving XML Document Validation with Schematron. Dare Obasanjo Microsoft Corporation September 2004 Applies to: XML Schematron Summary: Dare Obasanjo describes how to use the Schematron XML validation language to enforce constraints on XML documents beyond the capabilities of the W3C XML Schema. (10 printed pages) Click here to download the code sample for this article. Contents Introduction The Sensational Six: The Basic Elements of Schematron Combining Schematron with W3C XML Schema Validation Using Schematron in the .NET Framework Conclusion Introduction An XML schema is used to describe the structure of an XML document by specifying the valid elements that can occur in a document, the order in which they can occur, and expressing constraints on certain aspects of these elements.
Describing and enforcing the contract between producers and consumers of XML documents: XML schemas are a fairly terse, machine-readable way to describe what constitutes a valid XML document according to a particular XML vocabulary. Constructors Properties Methods. Extending XML document validation with Schematron « AMIS Technology blog. The use of XML documents is common practice nowadays and so is XML schema (XSD) to validate XML documents. XML validation is often needed to ensure structure, content and relations are correct and valid. However validation only using a schema (XSD) only covers a small part: it can describe the basic XML structure (valid elements and order) and some basic content validation of a XML node. Schematron can be used to cover the remaining part of XML validation, like: Advanced structure validation e.g. element A should have either attribute X or attribute Y, but not both and always one of themStructure depending on content e.g. when attribute A of element B has value ‘x’ , then it should have child element CContent validation on multiple nodes e.g. sum of all percentage elements should be 100Relations between elements e.g.
Schematron, just like an XSD, is an XML document itself. Each validation rule is defined by a rule element. A rule element has one or more report and/or assert elements. Converting XML Schemas to Schematron (#9): Friendlier schemas. We can improve on the diagnostics given by the rules in the previous article in this series, Progressive validation for complex content models. Diagnosing Similar Names One of the most common typos is simply to make a mistake in upper-case/lower-case. We can generate Schematron code to check this: <sch:rule context="*[upper-case(local-name())=upper-case('Address')]"><sch:report test="true()">The unexpected element "<sch:name/>" has been used, which is close to an element in the schema: the element "Address".
</sch:report></sch:rule> And here is the XSLT for generating those Schematron rules: This code actually catches two problems: have you made an upper-/lower-case typo or have you used an element with a name in the current namespace but using a different namespace. Actually, the code as it is will generate a false positive if the same element name is used in multiple namespaces. Towards terser, more declarative schemas And here is an example for detecting various kinds of text content: Schematron Patterns and Validation. Schematron Patterns and Validation(Page 1 of 4 ) Patterns Rules can also be related to one another. For example, although rules can have different contexts, some can perform the same types of operations on one another. Some rules may deal with the structure of a document, checking for the presence of certain elements and attributes.
These rules would have different contexts, but they would be related. Other rules may operate on different contexts in the same hierarchy. Just as related assertions can be grouped into rules, related rules can be grouped into Schematron patterns. Creating a basic pattern isn't very hard at all. Documenting and Implementing Guidelines with Schematron. How to cite this paper Lubell, Joshua. “Documenting and Implementing Guidelines with Schematron.” Presented at Balisage: The Markup Conference 2009, Montréal, Canada, August 11 - 14, 2009. In Proceedings of Balisage: The Markup Conference 2009. Balisage Series on Markup Technologies, vol. 3 (2009). doi:10.4242/BalisageVol3.Lubell01.
Documenting and Implementing Guidelines with Schematron Balisage: The Markup Conference 2009August 11 - 14, 2009 Why Guidelines? Recognition of the need for interoperability led to a drive to standardize XML schemas meeting two requirements: Customizability – to enable interoperable extensions to be added, Inclusiveness – to facilitate use in multiple contexts. Whether they apply to e-business or text processing applications, interoperable data exchange specifications must be both inclusive enough to appeal to a broad community of developers and customizable enough to allow developers to add new elements when needed. Implementing Guidelines with Schematron. Validating TCDL 2.0 with ISO Schematron.
Editor: Christophe Strobbe (DocArch, Katholieke Universiteit Leuven). Latest version: ($Date: 2009/01/15 15:28:24 $). Introduction The Test Samples Development Task Force (TSDTF) uses a subset of TCDL 2.0 as metadata format. In addition to the constraints defined by the TCDL 2.0 Specification and Guide and W3C Schema for TCDL 2.0, the task force also uses a number of additional constraints, which are set out in WCAG 2.0 Test Samples Metadata and in Checklist for Structure Review. Validating with Saxon and the XSLT Implementation of ISO Schematron Getting and Installing Java This how-to guide assumes that you use Java to run Saxon. The Prerequisites for Saxon state that you need at least a Java VM (also known as JRE) to run Saxon. If you don't know if a JRE or JDK is available on your computer, you can open a command-line environment and type java -version.
Getting and Installing JAXP Getting and Installing Saxon. DocBook Release.