java.lang.Object
- net.sf.saxon.om.NamespaceConstant

```
public class NamespaceConstant
extends java.lang.Object
```
This class is not instantiated, it exists to hold a set of constants representing known namespaces. For each of these, there is a constant for the namespace URI and for many of them, there is a numeric constant used as the code for this namespace in the name pool.
This class also defines constant URIs for some objects other than namespaces - for example, URIs that identify the various object models used in the JAXP XPath API, and the Unicode codepoint collation URI.

Author:

Michael H. Kay

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`ANONYMOUS`	Namespace for names allocated to anonymous types.
`static java.lang.String`	`CODEPOINT_COLLATION_URI`	URI identifying the Unicode codepoint collation
`static java.lang.String`	`DOT_NET_TYPE`	Namespace for types representing external .NET objects
`static java.lang.String`	`ERR`	The standard namespace for system error codes
`static java.lang.String`	`EXSLT_COMMON`	Fixed namespace name for EXSLT/Common: "http://exslt.org/common"
`static java.lang.String`	`EXSLT_DATES_AND_TIMES`	Fixed namespace name for EXSLT/date: "http://exslt.org/dates-and-times"
`static java.lang.String`	`EXSLT_MATH`	Fixed namespace name for EXSLT/math: "http://exslt.org/math"
`static java.lang.String`	`EXSLT_RANDOM`	Fixed namespace name for EXSLT/random: "http://exslt.org/random"
`static java.lang.String`	`EXSLT_SETS`	Fixed namespace name for EXSLT/sets: "http://exslt.org/sets"
`static java.lang.String`	`FN`	The standard namespace for functions and operators
`static java.lang.String`	`JAVA_TYPE`	Namespace for types representing external Java objects
`static java.lang.String`	`LOCAL`	Predefined XQuery namespace for local functions
`static java.lang.String`	`MICROSOFT_XSL`	Recognize the Microsoft namespace so we can give a suitably sarcastic error message
`static java.lang.String`	`NULL`	A URI representing the null namespace (actually, an empty string)
`static short`	`NULL_CODE`	The numeric code representing the null namespace (actually, zero)
`static int`	`NULL_NAMESPACE_CODE`	The namespace code for the null namespace
`static java.lang.String`	`OBJECT_MODEL_DOM4J`	URI identifying the DOM4J object model for use in the JAXP 1.3 XPath API
`static java.lang.String`	`OBJECT_MODEL_JDOM`	URI identifying the JDOM object model for use in the JAXP 1.3 XPath API
`static java.lang.String`	`OBJECT_MODEL_SAXON`	URI identifying the Saxon object model for use in the JAXP 1.3 XPath API
`static java.lang.String`	`OBJECT_MODEL_XOM`	URI identifying the XOM object model for use in the JAXP 1.3 XPath API
`static java.lang.String`	`SAXON`	Fixed namespace name for SAXON: "http://saxon.sf.net/"
`static short`	`SAXON_CODE`	Numeric code representing the SAXON namespace
`static java.lang.String`	`SCHEMA`	Namespace name for XML Schema: "http://www.w3.org/2001/XMLSchema"
`static short`	`SCHEMA_CODE`	Numeric code representing the schema namespace
`static java.lang.String`	`SCHEMA_INSTANCE`	XML-schema-defined namespace for use in instance documents ("xsi")
`static java.lang.String`	`XDT`	Namespace for additional XPath-defined data types: "http://www.w3.org/2005/xpath-datatypes"
`static short`	`XDT_CODE`	Numeric code representing the schema namespace
`static java.lang.String`	`XDT200407`
`static java.lang.String`	`XDT200410`
`static java.lang.String`	`XDT200502`
`static java.lang.String`	`XDT200504`	Older versions of XDT namespace
`static java.lang.String`	`XHTML`	The XHTML namespace http://www.w3.org/1999/xhtml
`static java.lang.String`	`XML`	Fixed namespace name for XML: "http://www.w3.org/XML/1998/namespace".
`static short`	`XML_CODE`	Numeric code representing the XML namespace
`static int`	`XML_NAMESPACE_CODE`	The namespace code for the XML namespace
`static java.lang.String`	`XMLNS`	The XMLNS namespace (used in DOM)
`static short`	`XSI_CODE`
`static java.lang.String`	`XSLT`	Fixed namespace name for XSLT: "http://www.w3.org/1999/XSL/Transform"
`static short`	`XSLT_CODE`	Numeric code representing the XSLT namespace

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`isReserved(java.lang.String uri)`	Determine whether a namespace is a reserved namespace
`static boolean`	`isReservedInQuery(java.lang.String uri)`	Determine whether a namespace is a reserved namespace
`static boolean`	`isSpecialURICode(short uriCode)`	Determine whether a namespace is a reserved namespace
`static boolean`	`isXDTNamespace(java.lang.String uri)`	Test whether a namespace is the XDT namespace

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

- Field Detail
  - NULL
```
public static final java.lang.String NULL
```
    A URI representing the null namespace (actually, an empty string)
    
    See Also:
    
    Constant Field Values
  - NULL_CODE
```
public static final short NULL_CODE
```
    The numeric code representing the null namespace (actually, zero)
    
    See Also:
    
    Constant Field Values
  - NULL_NAMESPACE_CODE
```
public static final int NULL_NAMESPACE_CODE
```
    The namespace code for the null namespace
    
    See Also:
    
    Constant Field Values
  - XML
```
public static final java.lang.String XML
```
    Fixed namespace name for XML: "http://www.w3.org/XML/1998/namespace".
    
    See Also:
    
    Constant Field Values
  - XML_CODE
```
public static final short XML_CODE
```
    Numeric code representing the XML namespace
    
    See Also:
    
    Constant Field Values
  - XML_NAMESPACE_CODE
```
public static final int XML_NAMESPACE_CODE
```
    The namespace code for the XML namespace
    
    See Also:
    
    Constant Field Values
  - XSLT
```
public static final java.lang.String XSLT
```
    Fixed namespace name for XSLT: "http://www.w3.org/1999/XSL/Transform"
    
    See Also:
    
    Constant Field Values
  - XSLT_CODE
```
public static final short XSLT_CODE
```
    Numeric code representing the XSLT namespace
    
    See Also:
    
    Constant Field Values
  - SAXON
```
public static final java.lang.String SAXON
```
    Fixed namespace name for SAXON: "http://saxon.sf.net/"
    
    See Also:
    
    Constant Field Values
  - SAXON_CODE
```
public static final short SAXON_CODE
```
    Numeric code representing the SAXON namespace
    
    See Also:
    
    Constant Field Values
  - SCHEMA
```
public static final java.lang.String SCHEMA
```
    Namespace name for XML Schema: "http://www.w3.org/2001/XMLSchema"
    
    See Also:
    
    Constant Field Values
  - SCHEMA_CODE
```
public static final short SCHEMA_CODE
```
    Numeric code representing the schema namespace
    
    See Also:
    
    Constant Field Values
  - XDT
```
public static final java.lang.String XDT
```
    Namespace for additional XPath-defined data types: "http://www.w3.org/2005/xpath-datatypes"
    
    See Also:
    
    Constant Field Values
  - XDT200504
```
public static final java.lang.String XDT200504
```
    Older versions of XDT namespace
    
    See Also:
    
    Constant Field Values
  - XDT200502
```
public static final java.lang.String XDT200502
```
    See Also:
    
    Constant Field Values
  - XDT200410
```
public static final java.lang.String XDT200410
```
    See Also:
    
    Constant Field Values
  - XDT200407
```
public static final java.lang.String XDT200407
```
    See Also:
    
    Constant Field Values
  - XDT_CODE
```
public static final short XDT_CODE
```
    Numeric code representing the schema namespace
    
    See Also:
    
    Constant Field Values
  - SCHEMA_INSTANCE
```
public static final java.lang.String SCHEMA_INSTANCE
```
    XML-schema-defined namespace for use in instance documents ("xsi")
    
    See Also:
    
    Constant Field Values
  - XSI_CODE
```
public static final short XSI_CODE
```
    See Also:
    
    Constant Field Values
  - EXSLT_COMMON
```
public static final java.lang.String EXSLT_COMMON
```
    Fixed namespace name for EXSLT/Common: "http://exslt.org/common"
    
    See Also:
    
    Constant Field Values
  - EXSLT_MATH
```
public static final java.lang.String EXSLT_MATH
```
    Fixed namespace name for EXSLT/math: "http://exslt.org/math"
    
    See Also:
    
    Constant Field Values
  - EXSLT_SETS
```
public static final java.lang.String EXSLT_SETS
```
    Fixed namespace name for EXSLT/sets: "http://exslt.org/sets"
    
    See Also:
    
    Constant Field Values
  - EXSLT_DATES_AND_TIMES
```
public static final java.lang.String EXSLT_DATES_AND_TIMES
```
    Fixed namespace name for EXSLT/date: "http://exslt.org/dates-and-times"
    
    See Also:
    
    Constant Field Values
  - EXSLT_RANDOM
```
public static final java.lang.String EXSLT_RANDOM
```
    Fixed namespace name for EXSLT/random: "http://exslt.org/random"
    
    See Also:
    
    Constant Field Values
  - FN
```
public static final java.lang.String FN
```
    The standard namespace for functions and operators
    
    See Also:
    
    Constant Field Values
  - ERR
```
public static final java.lang.String ERR
```
    The standard namespace for system error codes
    
    See Also:
    
    Constant Field Values
  - LOCAL
```
public static final java.lang.String LOCAL
```
    Predefined XQuery namespace for local functions
    
    See Also:
    
    Constant Field Values
  - MICROSOFT_XSL
```
public static final java.lang.String MICROSOFT_XSL
```
    Recognize the Microsoft namespace so we can give a suitably sarcastic error message
    
    See Also:
    
    Constant Field Values
  - XHTML
```
public static final java.lang.String XHTML
```
    The XHTML namespace http://www.w3.org/1999/xhtml
    
    See Also:
    
    Constant Field Values
  - XMLNS
```
public static final java.lang.String XMLNS
```
    The XMLNS namespace (used in DOM)
    
    See Also:
    
    Constant Field Values
  - JAVA_TYPE
```
public static final java.lang.String JAVA_TYPE
```
    Namespace for types representing external Java objects
    
    See Also:
    
    Constant Field Values
  - DOT_NET_TYPE
```
public static final java.lang.String DOT_NET_TYPE
```
    Namespace for types representing external .NET objects
    
    See Also:
    
    Constant Field Values
  - ANONYMOUS
```
public static final java.lang.String ANONYMOUS
```
    Namespace for names allocated to anonymous types. This exists so that a name fingerprint can be allocated for use as a type annotation.
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_SAXON
```
public static final java.lang.String OBJECT_MODEL_SAXON
```
    URI identifying the Saxon object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_XOM
```
public static final java.lang.String OBJECT_MODEL_XOM
```
    URI identifying the XOM object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_JDOM
```
public static final java.lang.String OBJECT_MODEL_JDOM
```
    URI identifying the JDOM object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_DOM4J
```
public static final java.lang.String OBJECT_MODEL_DOM4J
```
    URI identifying the DOM4J object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - CODEPOINT_COLLATION_URI
```
public static final java.lang.String CODEPOINT_COLLATION_URI
```
    URI identifying the Unicode codepoint collation
    
    See Also:
    
    Constant Field Values
- Method Detail
  - isXDTNamespace
```
public static final boolean isXDTNamespace(java.lang.String uri)
```
    Test whether a namespace is the XDT namespace
  - isReserved
```
public static final boolean isReserved(java.lang.String uri)
```
    Determine whether a namespace is a reserved namespace
  - isSpecialURICode
```
public static final boolean isSpecialURICode(short uriCode)
```
    Determine whether a namespace is a reserved namespace
  - isReservedInQuery
```
public static final boolean isReservedInQuery(java.lang.String uri)
```
    Determine whether a namespace is a reserved namespace

Class NamespaceConstant

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NULL

NULL_CODE

NULL_NAMESPACE_CODE

XML

XML_CODE

XML_NAMESPACE_CODE

XSLT

XSLT_CODE

SAXON

SAXON_CODE

SCHEMA

SCHEMA_CODE

XDT

XDT200504

XDT200502

XDT200410

XDT200407

XDT_CODE

SCHEMA_INSTANCE

XSI_CODE

EXSLT_COMMON

EXSLT_MATH

EXSLT_SETS

EXSLT_DATES_AND_TIMES

EXSLT_RANDOM

FN

ERR

LOCAL

MICROSOFT_XSL

XHTML

XMLNS

JAVA_TYPE

DOT_NET_TYPE

ANONYMOUS

OBJECT_MODEL_SAXON

OBJECT_MODEL_XOM

OBJECT_MODEL_JDOM

OBJECT_MODEL_DOM4J

CODEPOINT_COLLATION_URI

Method Detail

isXDTNamespace

isReserved

isSpecialURICode

isReservedInQuery