XML Schema Preferences

Xerces validation features

• Default XML Schema version - Allows you to select the version of W3C XML Schema: XML Schema 1.0 or XML Schema 1.1.
  Note: You are also able to set the XML Schema version using the Customize option in New dialog box.
• Default XML Schema validation engine - Allows you to set the default XML Schema validation engine either to Xerces or Saxon EE.

• Enable full schema constraint checking (http://apache.org/xml/features/validation/schema-full-checking) - Sets the schema-full-checking feature to true. This enables a validation of the parsed XML document against a schema (W3C XML Schema or DTD) while the document is parsed.
• Enable honour all schema location feature (http://apache.org/xml/features/honour-all-schema-location) - Sets the honour-all-schema-location feature to true. All the files that declare W3C XML Schema components from the same namespace are used to compose the validation model. In case this option is disabled, only the first W3C XML Schema file that is encountered in the XML Schema import tree is taken into account.
• Enable full XPath 2.0 in assertions and alternative types (http://apache.org/xml/features/validation/cta-full-xpath-checking ) - When enabled (default value), you can use the full XPath support in assertions and alternative types. Otherwise, only the XPath support offered by the Xerces engine is available.
• Assertions can see comments and processing instructions (http://apache.org/xml/features/validation/assert-comments-and-pi-checking ) - Controls whether comments and processing instructions are visible to the XPath expression used for defining an assertion in XSD 1.1.

Saxon validation features

• Multiple schema imports - Forces xs:import to fetch the referenced schema document. By default, the xs:import fetches the document only if no schema document for the given namespace has already been loaded. With this option in effect, the referenced schema document is loaded unless the absolute URI is the same as a schema document already loaded.
• Assertions can see comments and processing instructions - Controls whether comments and processing instructions are visible to the XPath expression used to define an assertion. By default (unlike Saxon 9.3), they are not made visible.