XML Standard API: Class XMLConstants

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## javax.xml
Class XMLConstants

    java.lang.Object
      |
      +--javax.xml.XMLConstants

public final class XMLConstants
extends java.lang.Object

Utility class to contain basic XML values as constants.

Since:
  1.5
Version:
  $Revision: 446598 $, $Date: 2006-09-15 08:55:40 -0400 (Fri, 15 Sep 2006) $
Author:
  Jeff Suttor
See Also:
  Extensible Markup Language (XML) 1.1, Extensible Markup Language (XML) 1.0 (Second Edition), XML 1.0 Second Edition Specification Errata, Namespaces in XML 1.1, Namespaces in XML, Namespaces in XML Errata, XML Schema Part 1: Structures

Field Summary
`static java.lang.String` | `DEFAULT_NS_PREFIX` Prefix to use to represent the default XML Namespace.
`static java.lang.String` | `FEATURE_SECURE_PROCESSING` Feature for secure processing.
`static java.lang.String` | `NULL_NS_URI` Namespace URI to use to represent that there is no Namespace.
`static java.lang.String` | `RELAXNG_NS_URI` RELAX NG Namespace URI.
`static java.lang.String` | `W3C_XML_SCHEMA_INSTANCE_NS_URI` W3C XML Schema Instance Namespace URI.
`static java.lang.String` | `W3C_XML_SCHEMA_NS_URI` W3C XML Schema Namespace URI.
`static java.lang.String` | `W3C_XPATH_DATATYPE_NS_URI` W3C XPath Datatype Namespace URI.
`static java.lang.String` | `XML_DTD_NS_URI` XML Document Type Declaration Namespace URI as an arbitrary value.
`static java.lang.String` | `XML_NS_PREFIX` The official XML Namespace prefix.
`static java.lang.String` | `XML_NS_URI` The official XML Namespace name URI.
`static java.lang.String` | `XMLNS_ATTRIBUTE` The official XML attribute used for specifying XML Namespace declarations.
`static java.lang.String` | `XMLNS_ATTRIBUTE_NS_URI` The official XML attribute used for specifying XML Namespace declarations, `XMLConstants.XMLNS_ATTRIBUTE`, Namespace name URI.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### NULL_NS_URI

    public static final java.lang.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

### DEFAULT_NS_PREFIX

    public static final java.lang.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

### XML_NS_URI

    public static final java.lang.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

### XML_NS_PREFIX

    public static final java.lang.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<

### XMLNS_ATTRIBUTE_NS_URI

    public static final java.lang.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, Namespaces in XML Errata

### XMLNS_ATTRIBUTE

    public static final java.lang.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

### W3C_XML_SCHEMA_NS_URI

    public static final java.lang.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

### W3C_XML_SCHEMA_INSTANCE_NS_URI

    public static final java.lang.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

### W3C_XPATH_DATATYPE_NS_URI

    public static final java.lang.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

### XML_DTD_NS_URI

    public static final java.lang.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`".

### RELAXNG_NS_URI

    public static final java.lang.String RELAXNG_NS_URI

  RELAX NG Namespace URI.

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

  See Also:
    RELAX NG Specification

### FEATURE_SECURE_PROCESSING

    public static final java.lang.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 acording the letter of the XML specifications ingoring security issues such as limits on XML constructs to avoid conditions such as denial of service attacks.

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