Class XMLConstants
- java.lang.Object
-
- javax.xml.XMLConstants
-
public final class XMLConstants extends Object
Utility class to contain basic XML values as constants.
- Since:
- 1.5
- Version:
- $Revision: 1.8 $, $Date: 2010/05/25 16:19:45 $
- 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
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-
Field Summary
Fields Modifier and Type Field and Description static String
ACCESS_EXTERNAL_DTD
Property: accessExternalDTDstatic String
ACCESS_EXTERNAL_SCHEMA
Property: accessExternalSchemastatic String
ACCESS_EXTERNAL_STYLESHEET
Property: accessExternalStylesheetstatic 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
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.
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Field Detail
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 "".
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 "".
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
".
XML_NS_PREFIX
public static final String XML_NS_PREFIX
The official XML Namespace prefix.
Defined by the XML specification to be "
xml
".
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/
".
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
".
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
".
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
".
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
".
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 a
URI
, 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
.${JAVA_HOME}/lib/jaxp.properties: This configuration file is in standard
Properties
format. 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 a
URI
, 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
${JAVA_HOME}/lib/jaxp.properties: This configuration file is in standard java.util.Properties format. 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 new
Transformer
for example,TransformerConfigurationException
will be thrown by theTransformerFactory
.Value: a list of protocols separated by comma. A protocol is the scheme portion of a
URI
, 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
${JAVA_HOME}/lib/jaxp.properties: This configuration file is in standard java.util.Properties format. 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
-
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