org.w3c.dom
Interface TypeInfo
The
TypeInfo interface represents a type referenced from
Element or
Attr nodes, specified in the schemas
associated with the document. The type is a pair of a namespace URI and
name properties, and depends on the document's schema.
If the document's schema is an XML DTD [
XML 1.0], the values
are computed as follows:
- If this type is referenced from an
Attr node, typeNamespace is
"http://www.w3.org/TR/REC-xml" and typeName
represents the [attribute type] property in the [XML Information Set]
. If there is no declaration for the attribute, typeNamespace
and typeName are null.
- If this type is
referenced from an
Element node, typeNamespace
and typeName are null.
If the document's schema is an XML Schema [
XML Schema Part 1]
, the values are computed as follows using the post-schema-validation
infoset contributions (also called PSVI contributions):
- If the [validity] property exists AND is "invalid" or "notKnown": the {target namespace} and {name} properties of the declared type if
available, otherwise
null.
Note: At the time of writing, the XML Schema specification does
not require exposing the declared type. Thus, DOM implementations might
choose not to provide type information if validity is not valid.
- If the [validity] property exists and is "valid":
- If [member type definition] exists:
- If {name} is not absent, then expose {name} and {target
namespace} properties of the [member type definition] property;
- Otherwise, expose the namespace and local name of the
corresponding anonymous type name.
- If the [type definition] property exists:
- If {name} is not absent, then expose {name} and {target
namespace} properties of the [type definition] property;
- Otherwise, expose the namespace and local name of the
corresponding anonymous type name.
- If the [member type definition anonymous] exists:
- If it is false, then expose [member type definition name] and [member type definition namespace] properties;
- Otherwise, expose the namespace and local name of the
corresponding anonymous type name.
- If the [type definition anonymous] exists:
- If it is false, then expose [type definition name] and [type definition namespace] properties;
- Otherwise, expose the namespace and local name of the
corresponding anonymous type name.
Note: Other schema languages are outside the scope of the W3C
and therefore should define how to represent their type systems using
TypeInfo.
See also the
Document Object Model (DOM) Level 3 Core Specification.
String | getTypeName()- The name of a type declared for the associated element or attribute,
or
null if unknown.
|
String | getTypeNamespace()- The namespace of the type declared for the associated element or
attribute or
null if the element does not have
declaration or if no namespace information is available.
|
boolean | isDerivedFrom(String typeNamespaceArg, String typeNameArg, int derivationMethod)- This method returns if there is a derivation between the reference
type definition, i.e. the
TypeInfo on which the method
is being called, and the other type definition, i.e. the one passed
as parameters.
|
DERIVATION_EXTENSION
public static final int DERIVATION_EXTENSION
If the document's schema is an XML Schema [
XML Schema Part 1]
, this constant represents the derivation by
extension.
The reference type definition is derived by extension from the
other type definition if the other type definition can be reached
recursively following the {base type definition} property from the
reference type definition, and at least one of the
derivation methods involved is an extension.
DERIVATION_LIST
public static final int DERIVATION_LIST
If the document's schema is an XML Schema [
XML Schema Part 1]
, this constant represents the
list.
The reference type definition is derived by list from the other
type definition if there exists two type definitions T1 and T2 such
as the reference type definition is derived from T1 by
DERIVATION_RESTRICTION or
DERIVATION_EXTENSION, T2 is derived from the other type
definition by
DERIVATION_RESTRICTION, T1 has {variety}
list, and T2 is the {item type definition}. Note that T1 could be the same as
the reference type definition, and T2 could be the same as the other
type definition.
DERIVATION_RESTRICTION
public static final int DERIVATION_RESTRICTION
If the document's schema is an XML Schema [
XML Schema Part 1]
, this constant represents the derivation by
restriction if complex types are involved, or a
restriction if simple types are involved.
The reference type definition is derived by restriction from the
other type definition if the other type definition is the same as the
reference type definition, or if the other type definition can be
reached recursively following the {base type definition} property
from the reference type definition, and all the
derivation methods involved are restriction.
DERIVATION_UNION
public static final int DERIVATION_UNION
If the document's schema is an XML Schema [
XML Schema Part 1]
, this constant represents the
union if simple types are involved.
The reference type definition is derived by union from the other
type definition if there exists two type definitions T1 and T2 such
as the reference type definition is derived from T1 by
DERIVATION_RESTRICTION or
DERIVATION_EXTENSION, T2 is derived from the other type
definition by
DERIVATION_RESTRICTION, T1 has {variety}
union, and one of the {member type definitions} is T2. Note that T1 could be
the same as the reference type definition, and T2 could be the same
as the other type definition.
getTypeName
public String getTypeName()
The name of a type declared for the associated element or attribute,
or null if unknown.
getTypeNamespace
public String getTypeNamespace()
The namespace of the type declared for the associated element or
attribute or null if the element does not have
declaration or if no namespace information is available.
isDerivedFrom
public boolean isDerivedFrom(String typeNamespaceArg,
String typeNameArg,
int derivationMethod) This method returns if there is a derivation between the reference
type definition, i.e. the TypeInfo on which the method
is being called, and the other type definition, i.e. the one passed
as parameters.
typeNamespaceArg - the namespace of the other type definition.typeNameArg - the name of the other type definition.derivationMethod - the type of derivation and conditions applied
between two types, as described in the list of constants provided
in this interface.
- If the document's schema is a DTD or no schema is associated
with the document, this method will always return
false
. If the document's schema is an XML Schema, the method will
true if the reference type definition is derived from
the other type definition according to the derivation parameter. If
the value of the parameter is 0 (no bit is set to
1 for the derivationMethod parameter),
the method will return true if the other type
definition can be reached by recursing any combination of {base
type definition}, {item type definition}, or {member type
definitions} from the reference type definition.
* Copyright (c) 2004 World Wide Web Consortium,
*
* (Massachusetts Institute of Technology, European Research Consortium for
* Informatics and Mathematics, Keio University). All Rights Reserved. This
* work is distributed under the W3C(r) Software License [1] in the hope that
* it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231