## Package org.apache.xerces.impl.xs

Class Summary
AttributePSVImpl: Attribute PSV infoset augmentations implementation.
ElementPSVImpl: Element PSV infoset augmentations implementation.
SchemaGrammar: This class is to hold all schema component declaration that are declared within one namespace.
SchemaGrammar.BuiltinSchemaGrammar
SchemaGrammar.Schema4Annotations: A partial schema for schemas for validating annotations.
SchemaNamespaceSupport: This class customizes the behaviour of the util.NamespaceSupport class in order to easily implement some features that we need for efficient schema handling.
SchemaSymbols: Collection of symbols used to parse a Schema Grammar.

SubstitutionGroupHandler

To store and validate information about substitutionGroup

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XMLSchemaLoader: This class implements xni.grammars.XMLGrammarLoader.
XMLSchemaValidator: The XML Schema validator.
XMLSchemaValidator.LocalIDKey
XMLSchemaValidator.ShortVector: A simple vector for `short`s.
XMLSchemaValidator.XPathMatcherStack: Stack of XPath matchers for identity constraints.
XSAnnotationImpl: This is an implementation of the XSAnnotation schema component.

XSAttributeDecl

The XML representation for an attribute declaration schema component is an <attribute> element information item

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XSAttributeGroupDecl

The XML representation for an attribute group declaration schema component is a global <attributeGroup> element information item

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XSAttributeUseImpl

The XML representation for an attribute use schema component is a local <attribute> element information item

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XSComplexTypeDecl

The XML representation for a complexType schema component is a <complexType> element information item

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XSConstraints

Constraints shared by traversers and validator

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XSDDescription: All information specific to XML Schema grammars.
XSDeclarationPool: This class is pool that enables caching of XML Schema declaration objects.

XSElementDecl

The XML representation for an element declaration schema component is an <element> element information item

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XSGrammarBucket

A class used to hold the internal schema grammar set for the current instance

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XSGroupDecl

The XML representation for a group declaration schema component is a global <group> element information item

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XSImplementationImpl: Implements XSImplementation interface that allows one to retrieve an instance of `XSLoader`.
XSLoaderImpl: An implementation of XSLoader which wraps XMLSchemaLoader.

XSMessageFormatter

SchemaMessageProvider implements an XMLMessageProvider that provides localizable error messages for the W3C XML Schema Language

# INTERNAL:

XSModelGroupImpl: Store schema model group declaration.
XSModelImpl: Implements XSModel: a read-only interface that represents an XML Schema, which could be components from different namespaces.

XSNotationDecl

The XML representation for a NOTATION declaration schema component is a global <notation> element information item

# INTERNAL:

XSParticleDecl: Store schema particle declaration.

XSWildcardDecl

The XML representation for a wildcard declaration schema component is an <any> or <anyAttribute> element information item

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Exception Summary
XMLSchemaException: This exception might be thrown by any constraint checking method.

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