public final Class XMLConstants

Property: accessExternalDTD

Restrict access to external DTDs and external Entity References to the protocols specified. If access is denied due to the restriction of this property, a runtime exception that is specific to the context is thrown. In the case of javax.xml.parsers.SAXParser for example, org.xml.sax.SAXException is thrown.

Value: as defined in the class description.

System Property: javax.xml.accessExternalDTD.

Configuration File: Yes. The property can be set in the configuration file.

Since

1.7

Property: accessExternalSchema

Restrict access to the protocols specified for external reference set by the schemaLocation attribute, Import and Include element. If access is denied due to the restriction of this property, a runtime exception that is specific to the context is thrown. In the case of javax.xml.validation.SchemaFactory for example, org.xml.sax.SAXException is thrown.

Value: as defined in the class description.

System Property: javax.xml.accessExternalSchema

Configuration File: Yes. The property can be set in the configuration file.

Since

1.7

Property: accessExternalStylesheet

Restrict access to the protocols specified for external references set by the stylesheet processing instruction, Import and Include element, and document function. If access is denied due to the restriction of this property, a runtime exception that is specific to the context is thrown. In the case of constructing new javax.xml.transform.Transformer for example, javax.xml.transform.TransformerConfigurationException will be thrown by the javax.xml.transform.TransformerFactory.

Value: as defined in the class description.

System Property: javax.xml.accessExternalStylesheet

Configuration File: Yes. The property can be set in the configuration file.

Since

1.7

Prefix to use to represent the default XML Namespace.

Defined by the XML specification to be "".

See Also

Namespaces in XML, 3. Qualified Names

Feature for secure processing.

• true instructs the implementation to process XML securely. This may set limits on XML constructs to avoid conditions such as denial of service attacks.
• false instructs the implementation to process XML in accordance with the XML specifications ignoring security issues such as limits on XML constructs to avoid conditions such as denial of service attacks.

Namespace URI to use to represent that there is no Namespace.

Defined by the Namespace specification to be "".

See Also

Namespaces in XML, 5.2 Namespace Defaulting

RELAX NG Namespace URI.

Defined to be "http://relaxng.org/ns/structure/1.0".

See Also

RELAX NG Specification

Feature: useCatalog

Instructs XML processors to use XML Catalogs to resolve entity references. Catalogs may be set through JAXP factories, system properties, or configuration file by using the javax.xml.catalog.files property defined in javax.xml.catalog.CatalogFeatures. The following code enables Catalog on SAX parser:

SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setFeature(XMLConstants.USE_CATALOG, true);
SAXParser parser = spf.newSAXParser();
parser.setProperty(CatalogFeatures.Feature.FILES.getPropertyName(), "catalog.xml");

Value: a boolean. If the value is true, and a catalog is set, the XML parser will resolve external references using javax.xml.catalog.CatalogResolver. If the value is false, XML Catalog is ignored even if one is set. The default value is true.

System Property: javax.xml.useCatalog

Configuration File: Yes. The property can be set in the configuration file.

Since

9

W3C XML Schema Instance Namespace URI.

Defined to be "http://www.w3.org/2001/XMLSchema-instance".

See Also

XML Schema Part 1: Structures, 2.6 Schema-Related Markup in Documents Being Validated

W3C XML Schema Namespace URI.

Defined to be "http://www.w3.org/2001/XMLSchema".

See Also

XML Schema Part 1: Structures, 2.6 Schema-Related Markup in Documents Being Validated

W3C XPath Datatype Namespace URI.

Defined to be "http://www.w3.org/2003/11/xpath-datatypes".

See Also

XQuery 1.0 and XPath 2.0 Data Model

XML Document Type Declaration Namespace URI as an arbitrary value.

Since not formally defined by any existing standard, arbitrarily define to be "http://www.w3.org/TR/REC-xml".

The official XML Namespace prefix.

Defined by the XML specification to be "xml".

See Also

Namespaces in XML, 3. Qualified Names

The official XML Namespace name URI.

Defined by the XML specification to be "http://www.w3.org/XML/1998/namespace".

See Also

Namespaces in XML, 3. Qualified Names

The official XML attribute used for specifying XML Namespace declarations.

It is NOT valid to use as a prefix. Defined by the XML specification to be "xmlns".

See Also

Namespaces in XML, 3. Qualified Names

The official XML attribute used for specifying XML Namespace declarations, XMLConstants.XMLNS_ATTRIBUTE, Namespace name URI.

Defined by the XML specification to be "http://www.w3.org/2000/xmlns/".

See Also

Namespaces in XML, 3. Qualified Names