XMLConstants (Java SE 15 & JDK 15) (original) (raw)

public final class XMLConstants extends Object

Utility class to contain basic XML values as constants.

Since:

1.5

Modifier and Type	Field	Description
static String	ACCESS_EXTERNAL_DTD	Property: accessExternalDTD
static String	ACCESS_EXTERNAL_SCHEMA	Property: accessExternalSchema
static String	ACCESS_EXTERNAL_STYLESHEET	Property: accessExternalStylesheet
static String	DEFAULT_NS_PREFIX	Prefix to use to represent the default XML Namespace.
static String	FEATURE_SECURE_PROCESSING	Feature for secure processing.
static String	NULL_NS_URI	Namespace URI to use to represent that there is no Namespace.
static String	RELAXNG_NS_URI	RELAX NG Namespace URI.
static String	USE_CATALOG	Feature: useCatalog
static String	W3C_XML_SCHEMA_INSTANCE_NS_URI	W3C XML Schema Instance Namespace URI.
static String	W3C_XML_SCHEMA_NS_URI	W3C XML Schema Namespace URI.
static String	W3C_XPATH_DATATYPE_NS_URI	W3C XPath Datatype Namespace URI.
static String	XML_DTD_NS_URI	XML Document Type Declaration Namespace URI as an arbitrary value.
static String	XML_NS_PREFIX	The official XML Namespace prefix.
static String	XML_NS_URI	The official XML Namespace name URI.
static String	XMLNS_ATTRIBUTE	The official XML attribute used for specifying XML Namespace declarations.
static String	XMLNS_ATTRIBUTE_NS_URI	The official XML attribute used for specifying XML Namespace declarations, XMLConstants.XMLNS_ATTRIBUTE, Namespace name URI.

Methods declared in class java.lang.Object

[clone](../../../java.base/java/lang/Object.html#clone%28%29), [equals](../../../java.base/java/lang/Object.html#equals%28java.lang.Object%29), [finalize](../../../java.base/java/lang/Object.html#finalize%28%29), [getClass](../../../java.base/java/lang/Object.html#getClass%28%29), [hashCode](../../../java.base/java/lang/Object.html#hashCode%28%29), [notify](../../../java.base/java/lang/Object.html#notify%28%29), [notifyAll](../../../java.base/java/lang/Object.html#notifyAll%28%29), [toString](../../../java.base/java/lang/Object.html#toString%28%29), [wait](../../../java.base/java/lang/Object.html#wait%28%29), [wait](../../../java.base/java/lang/Object.html#wait%28long%29), [wait](../../../java.base/java/lang/Object.html#wait%28long,int%29)

Field Details
- NULL_NS_URI
public static final String NULL_NS_URI
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, Constant Field Values
- DEFAULT_NS_PREFIX
public static final String DEFAULT_NS_PREFIX
Prefix to use to represent the default XML Namespace.
Defined by the XML specification to be "".
See Also:
Namespaces in XML, 3. Qualified Names, Constant Field Values
- XML_NS_URI
public static final String XML_NS_URI
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, Constant Field Values
- XML_NS_PREFIX
public static final String XML_NS_PREFIX
The official XML Namespace prefix.
Defined by the XML specification to be "xml".
See Also:
Namespaces in XML, 3. Qualified Names, Constant Field Values
- XMLNS_ATTRIBUTE_NS_URI
public static final String XMLNS_ATTRIBUTE_NS_URI
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, Constant Field Values
- XMLNS_ATTRIBUTE
public static final String XMLNS_ATTRIBUTE
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, Constant Field Values
- W3C_XML_SCHEMA_NS_URI
public static final String W3C_XML_SCHEMA_NS_URI
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, Constant Field Values
- W3C_XML_SCHEMA_INSTANCE_NS_URI
public static final String W3C_XML_SCHEMA_INSTANCE_NS_URI
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, Constant Field Values
- W3C_XPATH_DATATYPE_NS_URI
public static final String W3C_XPATH_DATATYPE_NS_URI
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, Constant Field Values
- XML_DTD_NS_URI
public static final String XML_DTD_NS_URI
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".
See Also:
Constant Field Values
- RELAXNG_NS_URI
public static final String RELAXNG_NS_URI
RELAX NG Namespace URI.
Defined to be "http://relaxng.org/ns/structure/1.0".
See Also:
RELAX NG Specification, Constant Field Values
- FEATURE_SECURE_PROCESSING
public static final String FEATURE_SECURE_PROCESSING
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.
See Also:
Constant Field Values
- ACCESS_EXTERNAL_DTD
public static final String ACCESS_EXTERNAL_DTD
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 SAXParser for example, SAXException is thrown.
Value: a list of protocols separated by comma. A protocol is the scheme portion of aURI, or in the case of the JAR protocol, "jar" plus the scheme portion separated by colon. A scheme is defined as:

scheme = alpha *( alpha | digit | "+" | "-" | "." )
where alpha = a-z and A-Z.

And the JAR protocol:
jar[:scheme]

Protocols including the keyword "jar" are case-insensitive. Any whitespaces as defined byCharacter.isSpaceChar(char) in the value will be ignored. Examples of protocols are file, http, jar:file.
Default value: The default value is implementation specific and therefore not specified. The following options are provided for consideration:
* an empty string to deny all access to external references;
* a specific protocol, such as file, to give permission to only the protocol;
* the keyword "all" to grant permission to all protocols.

When FEATURE_SECURE_PROCESSING is enabled, it is recommended that implementations restrict external connections by default, though this may cause problems for applications that process XML/XSD/XSL with external references.
Granting all access: the keyword "all" grants permission to all protocols.
System Property: The value of this property can be set or overridden by system property javax.xml.accessExternalDTD.
jaxp.properties: This configuration file is in standardProperties format and typically located in the conf directory of the Java installation. If the file exists and the system property is specified, its value will be used to override the default of the property.
Since:
1.7
See Also:
Constant Field Values
- ACCESS_EXTERNAL_SCHEMA
public static final String ACCESS_EXTERNAL_SCHEMA
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 SchemaFactory for example, org.xml.sax.SAXException is thrown.
Value: a list of protocols separated by comma. A protocol is the scheme portion of aURI, or in the case of the JAR protocol, "jar" plus the scheme portion separated by colon. A scheme is defined as:

scheme = alpha *( alpha | digit | "+" | "-" | "." )
where alpha = a-z and A-Z.

And the JAR protocol:
jar[:scheme]

Protocols including the keyword "jar" are case-insensitive. Any whitespaces as defined byCharacter.isSpaceChar(char) in the value will be ignored. Examples of protocols are file, http, jar:file.
Default value: The default value is implementation specific and therefore not specified. The following options are provided for consideration:
* an empty string to deny all access to external references;
* a specific protocol, such as file, to give permission to only the protocol;
* the keyword "all" to grant permission to all protocols.

When FEATURE_SECURE_PROCESSING is enabled, it is recommended that implementations restrict external connections by default, though this may cause problems for applications that process XML/XSD/XSL with external references.
Granting all access: the keyword "all" grants permission to all protocols.
System Property: The value of this property can be set or overridden by system property javax.xml.accessExternalSchema
jaxp.properties: This configuration file is in standardProperties format and typically located in the conf directory of the Java installation. If the file exists and the system property is specified, its value will be used to override the default of the property.
Since:
1.7
See Also:
Constant Field Values
- ACCESS_EXTERNAL_STYLESHEET
public static final String ACCESS_EXTERNAL_STYLESHEET
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 newTransformer for example,TransformerConfigurationException will be thrown by the TransformerFactory.
Value: a list of protocols separated by comma. A protocol is the scheme portion of aURI, or in the case of the JAR protocol, "jar" plus the scheme portion separated by colon. A scheme is defined as:

scheme = alpha *( alpha | digit | "+" | "-" | "." )
where alpha = a-z and A-Z.

And the JAR protocol:
jar[:scheme]

Protocols including the keyword "jar" are case-insensitive. Any whitespaces as defined byCharacter.isSpaceChar(char) in the value will be ignored. Examples of protocols are file, http, jar:file.
Default value: The default value is implementation specific and therefore not specified. The following options are provided for consideration:
* an empty string to deny all access to external references;
* a specific protocol, such as file, to give permission to only the protocol;
* the keyword "all" to grant permission to all protocols.

When FEATURE_SECURE_PROCESSING is enabled, it is recommended that implementations restrict external connections by default, though this may cause problems for applications that process XML/XSD/XSL with external references.
Granting all access: the keyword "all" grants permission to all protocols.
System Property: The value of this property can be set or overridden by system property javax.xml.accessExternalStylesheet
jaxp.properties: This configuration file is in standardProperties format and typically located in the conf directory of the Java installation. If the file exists and the system property is specified, its value will be used to override the default of the property.
Since:
1.7
See Also:
Constant Field Values
- USE_CATALOG
public static final String USE_CATALOG
Feature: useCatalog
Instructs XML processors to use XML Catalogs to resolve entity references. Catalogs may be set through JAXP factories, system properties, or jaxp.properties by using the javax.xml.catalog.files property defined in 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 usingCatalogResolver. If the value is false, XML Catalog is ignored even if one is set. The default value is true.
System Property: The value of this property can be set or overridden by system property javax.xml.useCatalog
jaxp.properties: This configuration file is in standardProperties format and typically located in the conf directory of the Java installation. If the file exists and the system property is specified, its value will be used to override the default value of the property.
Since:
9
See Also:
Constant Field Values

XMLConstants (Java SE 15 & JDK 15) (original) (raw)

Field Summary

Method Summary

Methods declared in class java.lang.Object

Field Details

NULL_NS_URI

DEFAULT_NS_PREFIX

XML_NS_URI

XML_NS_PREFIX

XMLNS_ATTRIBUTE_NS_URI

XMLNS_ATTRIBUTE

W3C_XML_SCHEMA_NS_URI

W3C_XML_SCHEMA_INSTANCE_NS_URI

W3C_XPATH_DATATYPE_NS_URI

XML_DTD_NS_URI

RELAXNG_NS_URI

FEATURE_SECURE_PROCESSING

ACCESS_EXTERNAL_DTD

ACCESS_EXTERNAL_SCHEMA

ACCESS_EXTERNAL_STYLESHEET

USE_CATALOG