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

```
public class NamespaceConstant
extends 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.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ANONYMOUS`	Namespace for names allocated to anonymous types.
`static String`	`ARRAY_FUNCTIONS`	Namespace URI for XPath 3.1 functions associated with arrays
`static String`	`CODEPOINT_COLLATION_URI`	URI identifying the Unicode codepoint collation
`static String`	`DOT_NET_TYPE`	Namespace for types representing external .NET objects
`static String`	`ERR`	The standard namespace for system error codes
`static String`	`EXPATH_ZIP`	URI for the EXPath zip module
`static String`	`EXSLT_COMMON`	Fixed namespace name for EXSLT/Common: "http://exslt.org/common"
`static String`	`EXSLT_DATES_AND_TIMES`	Fixed namespace name for EXSLT/date: "http://exslt.org/dates-and-times"
`static String`	`EXSLT_MATH`	Fixed namespace name for EXSLT/math: "http://exslt.org/math"
`static String`	`EXSLT_RANDOM`	Fixed namespace name for EXSLT/random: "http://exslt.org/random"
`static String`	`EXSLT_SETS`	Fixed namespace name for EXSLT/sets: "http://exslt.org/sets"
`static String`	`FN`	The standard namespace for functions and operators
`static String`	`GLOBAL_JS`	URI for the user extension calls in SaxonJS
`static String`	`HTML5_CASE_BLIND_COLLATION_URI`	URI identifying the HTML5 ascii-case-blind collation
`static String`	`IXSL`	URI for interactive XSLT extensions in Saxon-CE and SaxonJS
`static String`	`JAVA_TYPE`	Namespace for types representing external Java objects
`static String`	`LOCAL`	Predefined XQuery namespace for local functions
`static String`	`MAP_FUNCTIONS`	Namespace URI for XPath 3.0 functions associated with maps
`static String`	`MATH`	Math namespace for the XPath 3.0 math functions
`static String`	`MATHML`	The MathML namespace
`static String`	`NULL`	A URI representing the null namespace (actually, an empty string)
`static String`	`OBJECT_MODEL_AXIOM`	URI identifying the AXIOM object model for use in the JAXP 1.3 XPath API
`static String`	`OBJECT_MODEL_DOM4J`	URI identifying the DOM4J object model for use in the JAXP 1.3 XPath API
`static String`	`OBJECT_MODEL_DOMINO`	URI identifying the DOMINO object model (not used, but needed for consistency)
`static String`	`OBJECT_MODEL_DOT_NET_DOM`	URI identifying the .NET DOM object model (not used, but needed for consistency)
`static String`	`OBJECT_MODEL_JDOM`	URI identifying the JDOM object model for use in the JAXP 1.3 XPath API
`static String`	`OBJECT_MODEL_SAXON`	URI identifying the Saxon object model for use in the JAXP 1.3 XPath API
`static String`	`OBJECT_MODEL_XOM`	URI identifying the XOM object model for use in the JAXP 1.3 XPath API
`static String`	`OUTPUT`	The standard namespace for XQuery output declarations
`static String`	`PHP`	URI for the user extension calls in SaxonC for C++ and PHP
`static String`	`SAXON`	Current namespace name for SAXON (from 7.0 onwards): "http://saxon.sf.net/"
`static String`	`SAXON_CONFIGURATION`	URI for the Saxon configuration file
`static String`	`SAXON_GENERATED_VARIABLE`	URI for the names of generated variables
`static String`	`SAXON_XSLT_EXPORT`	Fixed namespace name for the export of a Saxon stylesheet package
`static String`	`SAXON6`	Old namespace name for SAXON6: "http://icl.com/saxon"
`static String`	`SCHEMA`	Namespace name for XML Schema: "http://www.w3.org/2001/XMLSchema"
`static String`	`SCHEMA_INSTANCE`	XML-schema-defined namespace for use in instance documents ("xsi")
`static String`	`SCHEMA_VERSIONING`	Namespace defined in XSD 1.1 for schema versioning
`static String`	`SCM`	Namespace for the Saxon serialization of the schema component model
`static String`	`SQL`	Fixed namespace name for SAXON SQL extension: "http://saxon.sf.net/sql"
`static String`	`SVG`	The SVG namespace
`static String`	`XHTML`	The XHTML namespace http://www.w3.org/1999/xhtml
`static String`	`XLINK`	The XLink namespace
`static String`	`XML`	Fixed namespace name for XML: "http://www.w3.org/XML/1998/namespace".
`static String`	`XMLNS`	The XMLNS namespace (used in DOM)
`static String`	`XQUERY`	The xquery namespace for the XQuery 3.0 declare option
`static String`	`XSLT`	Fixed namespace name for XSLT: "http://www.w3.org/1999/XSL/Transform"

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static String`	`findSimilarNamespace(String candidate)`	Find a similar namespace to one that is a possible mis-spelling
`static String`	`getConventionalPrefix(String uri)`	Get the conventional prefix for a common namespace
`static String`	`getUriForConventionalPrefix(String prefix)`	Get the URI associated with a commonly-used conventional prefix
`static boolean`	`isReserved(String uri)`	Determine whether a namespace is a reserved namespace
`static boolean`	`isReservedInQuery31(String uri)`	Determine whether a namespace is a reserved namespace in XQuery

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

- Field Detail
  - NULL
```
public static final String NULL
```
    A URI representing the null namespace (actually, an empty string)
    
    See Also:
    
    Constant Field Values
  - XML
```
public static final String XML
```
    Fixed namespace name for XML: "http://www.w3.org/XML/1998/namespace".
    
    See Also:
    
    Constant Field Values
  - XSLT
```
public static final String XSLT
```
    Fixed namespace name for XSLT: "http://www.w3.org/1999/XSL/Transform"
    
    See Also:
    
    Constant Field Values
  - SAXON
```
public static final String SAXON
```
    Current namespace name for SAXON (from 7.0 onwards): "http://saxon.sf.net/"
    
    See Also:
    
    Constant Field Values
  - SAXON6
```
public static final String SAXON6
```
    Old namespace name for SAXON6: "http://icl.com/saxon"
    
    See Also:
    
    Constant Field Values
  - SAXON_XSLT_EXPORT
```
public static final String SAXON_XSLT_EXPORT
```
    Fixed namespace name for the export of a Saxon stylesheet package
    
    See Also:
    
    Constant Field Values
  - SCHEMA
```
public static final String SCHEMA
```
    Namespace name for XML Schema: "http://www.w3.org/2001/XMLSchema"
    
    See Also:
    
    Constant Field Values
  - SCHEMA_INSTANCE
```
public static final String SCHEMA_INSTANCE
```
    XML-schema-defined namespace for use in instance documents ("xsi")
    
    See Also:
    
    Constant Field Values
  - SCHEMA_VERSIONING
```
public static final String SCHEMA_VERSIONING
```
    Namespace defined in XSD 1.1 for schema versioning
    
    See Also:
    
    Constant Field Values
  - SQL
```
public static final String SQL
```
    Fixed namespace name for SAXON SQL extension: "http://saxon.sf.net/sql"
    
    See Also:
    
    Constant Field Values
  - EXSLT_COMMON
```
public static final String EXSLT_COMMON
```
    Fixed namespace name for EXSLT/Common: "http://exslt.org/common"
    
    See Also:
    
    Constant Field Values
  - EXSLT_MATH
```
public static final String EXSLT_MATH
```
    Fixed namespace name for EXSLT/math: "http://exslt.org/math"
    
    See Also:
    
    Constant Field Values
  - EXSLT_SETS
```
public static final 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 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 String EXSLT_RANDOM
```
    Fixed namespace name for EXSLT/random: "http://exslt.org/random"
    
    See Also:
    
    Constant Field Values
  - FN
```
public static final String FN
```
    The standard namespace for functions and operators
    
    See Also:
    
    Constant Field Values
  - OUTPUT
```
public static final String OUTPUT
```
    The standard namespace for XQuery output declarations
    
    See Also:
    
    Constant Field Values
  - ERR
```
public static final String ERR
```
    The standard namespace for system error codes
    
    See Also:
    
    Constant Field Values
  - LOCAL
```
public static final String LOCAL
```
    Predefined XQuery namespace for local functions
    
    See Also:
    
    Constant Field Values
  - MATH
```
public static final String MATH
```
    Math namespace for the XPath 3.0 math functions
    
    See Also:
    
    Constant Field Values
  - MAP_FUNCTIONS
```
public static final String MAP_FUNCTIONS
```
    Namespace URI for XPath 3.0 functions associated with maps
    
    See Also:
    
    Constant Field Values
  - ARRAY_FUNCTIONS
```
public static final String ARRAY_FUNCTIONS
```
    Namespace URI for XPath 3.1 functions associated with arrays
    
    See Also:
    
    Constant Field Values
  - XHTML
```
public static final String XHTML
```
    The XHTML namespace http://www.w3.org/1999/xhtml
    
    See Also:
    
    Constant Field Values
  - SVG
```
public static final String SVG
```
    The SVG namespace
    
    See Also:
    
    Constant Field Values
  - MATHML
```
public static final String MATHML
```
    The MathML namespace
    
    See Also:
    
    Constant Field Values
  - XMLNS
```
public static final String XMLNS
```
    The XMLNS namespace (used in DOM)
    
    See Also:
    
    Constant Field Values
  - XLINK
```
public static final String XLINK
```
    The XLink namespace
    
    See Also:
    
    Constant Field Values
  - XQUERY
```
public static final String XQUERY
```
    The xquery namespace for the XQuery 3.0 declare option
    
    See Also:
    
    Constant Field Values
  - JAVA_TYPE
```
public static final String JAVA_TYPE
```
    Namespace for types representing external Java objects
    
    See Also:
    
    Constant Field Values
  - DOT_NET_TYPE
```
public static final String DOT_NET_TYPE
```
    Namespace for types representing external .NET objects
    
    See Also:
    
    Constant Field Values
  - ANONYMOUS
```
public static final 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
  - SCM
```
public static final String SCM
```
    Namespace for the Saxon serialization of the schema component model
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_SAXON
```
public static final 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 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 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_AXIOM
```
public static final String OBJECT_MODEL_AXIOM
```
    URI identifying the AXIOM object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_DOM4J
```
public static final String OBJECT_MODEL_DOM4J
```
    URI identifying the DOM4J object model for use in the JAXP 1.3 XPath API
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_DOT_NET_DOM
```
public static final String OBJECT_MODEL_DOT_NET_DOM
```
    URI identifying the .NET DOM object model (not used, but needed for consistency)
    
    See Also:
    
    Constant Field Values
  - OBJECT_MODEL_DOMINO
```
public static final String OBJECT_MODEL_DOMINO
```
    URI identifying the DOMINO object model (not used, but needed for consistency)
    
    See Also:
    
    Constant Field Values
  - CODEPOINT_COLLATION_URI
```
public static final String CODEPOINT_COLLATION_URI
```
    URI identifying the Unicode codepoint collation
    
    See Also:
    
    Constant Field Values
  - HTML5_CASE_BLIND_COLLATION_URI
```
public static final String HTML5_CASE_BLIND_COLLATION_URI
```
    URI identifying the HTML5 ascii-case-blind collation
    
    See Also:
    
    Constant Field Values
  - SAXON_GENERATED_VARIABLE
```
public static final String SAXON_GENERATED_VARIABLE
```
    URI for the names of generated variables
    
    See Also:
    
    Constant Field Values
  - SAXON_CONFIGURATION
```
public static final String SAXON_CONFIGURATION
```
    URI for the Saxon configuration file
    
    See Also:
    
    Constant Field Values
  - EXPATH_ZIP
```
public static final String EXPATH_ZIP
```
    URI for the EXPath zip module
    
    See Also:
    
    Constant Field Values
  - GLOBAL_JS
```
public static final String GLOBAL_JS
```
    URI for the user extension calls in SaxonJS
    
    See Also:
    
    Constant Field Values
  - PHP
```
public static final String PHP
```
    URI for the user extension calls in SaxonC for C++ and PHP
    
    See Also:
    
    Constant Field Values
  - IXSL
```
public static final String IXSL
```
    URI for interactive XSLT extensions in Saxon-CE and SaxonJS
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getConventionalPrefix
```
public static String getConventionalPrefix(String uri)
```
    Get the conventional prefix for a common namespace
    
    Parameters:
    
    uri - the namespace URI
    
    Returns:
    
    the conventional prefix for this URI if there is one, or null otherwise
  - getUriForConventionalPrefix
```
public static String getUriForConventionalPrefix(String prefix)
```
    Get the URI associated with a commonly-used conventional prefix
    
    Parameters:
    
    prefix - the namespace prefix
    
    Returns:
    
    the namespace URI associated with this conventional prefix
  - isReserved
```
public static boolean isReserved(String uri)
```
    Determine whether a namespace is a reserved namespace
    
    Parameters:
    
    uri - the namespace URI to be tested
    
    Returns:
    
    true if this namespace URI is a reserved namespace
  - isReservedInQuery31
```
public static boolean isReservedInQuery31(String uri)
```
    Determine whether a namespace is a reserved namespace in XQuery
    
    Parameters:
    
    uri - the namespace URI to be tested
    
    Returns:
    
    true if this namespace URI is reserved in XQuery 3.1
  - findSimilarNamespace
```
public static String findSimilarNamespace(String candidate)
```
    Find a similar namespace to one that is a possible mis-spelling
    
    Parameters:
    
    candidate - the possibly mis-spelt namespace
    
    Returns:
    
    the correct spelling of the namespace

Class NamespaceConstant

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NULL

XML

XSLT

SAXON

SAXON6

SAXON_XSLT_EXPORT

SCHEMA

SCHEMA_INSTANCE

SCHEMA_VERSIONING

SQL

EXSLT_COMMON

EXSLT_MATH

EXSLT_SETS

EXSLT_DATES_AND_TIMES

EXSLT_RANDOM

FN

OUTPUT

ERR

LOCAL

MATH

MAP_FUNCTIONS

ARRAY_FUNCTIONS

XHTML

SVG

MATHML

XMLNS

XLINK

XQUERY

JAVA_TYPE

DOT_NET_TYPE

ANONYMOUS

SCM

OBJECT_MODEL_SAXON

OBJECT_MODEL_XOM

OBJECT_MODEL_JDOM

OBJECT_MODEL_AXIOM

OBJECT_MODEL_DOM4J

OBJECT_MODEL_DOT_NET_DOM

OBJECT_MODEL_DOMINO

CODEPOINT_COLLATION_URI

HTML5_CASE_BLIND_COLLATION_URI

SAXON_GENERATED_VARIABLE

SAXON_CONFIGURATION

EXPATH_ZIP

GLOBAL_JS

PHP

IXSL

Method Detail

getConventionalPrefix

getUriForConventionalPrefix

isReserved

isReservedInQuery31

findSimilarNamespace