Package com.saxonica.ee.schema.sdoc

package com.saxonica.ee.schema.sdoc

Internal classes supporting the XDM tree representation of an XSD schema document. The various classes such as XSDAttributeGroup correspond to similarly-named elements in an XSD schema document, such as in this case xs:attribute-group. There are some differences, for example xs:restriction elements map to different classes depending on their parentage.

When importing a schema, the task is to read a schema provided as a source XML document, to validate that it conforms to all the XML representation rules defined in the W3C XML Schema specification, and to construct a representation of the schema using the classes in package com.saxonica.ee.schema. The classes in the importer package are transient, they are used only during the course of constructing the schema object model.

The process is analogous to the way stylesheets are built. Each schema document results in a Saxon tree. Each kind of element in the source schema is assigned to a specific class (a subclass of SchemaElement), which constructs the representation of the corresponding object in the schema object model.

Processing is in a number of phases:

1. The tree is constructed (which performs XML validation and namespace validation)
2. Attributes are processed and validated. At this stage the parent of a node is available but its siblings and children should not be accessed.
3. Structural validation is performed by the validate() method. This is essentially responsible for checking that the schema document is structurally valid according to the schema for schemas.
4. Semantic validation is carried out by the checkRepresentation() method. This is responsible for checking the rules in the XML Representation constraints.
5. Schema components are constructed by the buildComponents() method.

There should be no need for user applications to use any of the classes in this package.

Related Packages

Package	Description
com.saxonica.ee.schema	This package contains classes used to represent the information in a schema, that is, the schema components.
com.saxonica.ee.schema.fsa	The package com.saxonica.ee.schema.fsa contains classes used to implement the finite state machines used when validating document instances against a schema.

Classes

Class	Description
AnnotationParent	An abstract superclass for schema elements whose only permitted content is an Annotation element
LSSchemaResolver	This class is a SchemaURIResolver implemented as a wrapper around a JAXP LSResourceResolver
SaxonParam	This object represents a saxon:param element in a schema document.
SaxonPreprocess	saxon:preprocess is an implementation-defined pre-lexical facet as permitted by XML Schema 1.1.
SchemaDocument	An XML document containing a module of an XML Schema.
SchemaDocumentTransformer	Class that applies a standard transformation to a schema document: specifically, the chameleon transformation or the override transformation
SchemaElement	An element in an XML Schema document.
SchemaElement.XPathStaticContext
SchemaNodeFactory	Class SchemaNodeFactory.
SchemaReader	A class for reading XML Schema documents.
SelectionParser	This class parses the two XPath subsets defined in XML Schema for handling the "selector" and "field" attributes of the <unique>, <key>, and <keyref> elements.
SimpleTypeDefinition	A simple type definition holds all the information about a simpleType during the course of schema processing.
UnknownElement	An unknown element in an XML Schema document.
VersionControlFilter	This is a filter inserted into the input pipeline for processing schema documents, whose task is to examine attributes such as vc:maxVersion and discard those parts of the schema document that are to be ignored because of those attributes.
XMLNamespaceSchema	This module constructs synthetically (that is, without reading an XML schema document) the schema components for the XML namespace
XSDAlternative	An xs:alternative element in a schema (see draft XML Schema 1.1 Part 1)
XSDAnnotation	An xs:annotation element in an XML Schema document
XSDAny	An xs:any element in an XML Schema document
XSDAnyAttribute	An xs:anyAttribute element in an XML Schema document
XSDAssert	An xs:assert or xs:assertion element in a schema (see draft XML Schema 1.1 Part 1)
XSDAssert.CustomizedXPath	Define a customized XPath evaluator which injects code into the XPath code generation; this has the effect for a complex-type XSDAssert of modifying the expression so that instead of returning a boolean, it returns a list of nodes that contribute to the invalidity of the assertion.
XSDAttribute	An xs:attribute element in a schema document
XSDAttributeGroup	An xs:attributeGroup element in an XML Schema document
XSDComplexContent	An xs:complexContent element in an XML Schema Document
XSDComplexContentRestriction	An xs:restriction element that is a child of xs:complexContent within an XML Schema document
XSDComplexType	An xs:complexType element in an XML Schema document
XSDCompositor	An xs:sequence, xs:choice, or xs:all element in an XML Schema document
XSDDefaultOpenContent	An element in an XML Schema document defining the default open content
XSDDocumentation	An xs:documentation or xs:appinfo element in an XML Schema document
XSDElement	An xs:element element in a schema document
XSDExtension	An xs:extension element in a schema document
XSDFacet	An element in an XML Schema document representing a facet, for example minLength or pattern or enumeration: any facet except assertion, which is represented by the XSDAssert class
XSDFieldOrSelector	An xs:field or xs:selector element in an XML Schema document
XSDGroup	An xs:group element in an XML Schema document
XSDIdentityConstraint	An xs:unique, xs:key, or xs:keyref element in an XML Schema document
XSDImport	An xs:import element in an XML Schema document
XSDInclude	An xs:include element in an XML Schema document
XSDList	This class represents an xs:list element in a schema document.
XSDNotation	An element in an XML Schema document representing a notation declaration
XSDOpenContent	An element in an XML Schema document defining the default open content
XSDOverride	An xs:override element in an XML Schema Document
XSDRedefine	An xs:redefine element in an XML Schema Document
XSDSchema	An xs:schema element in an XML Schema document
XSDSimpleContent	An xs:simpleContent element in an XML Schema document
XSDSimpleContentRestriction	An xs:restriction element in an XML Schema document that appears as a child of an xs:simpleContent element
XSDSimpleType	An xs:simple-type element in an XML Schema document
XSDSimpleTypeRestriction	An xs:restriction element in an XML Schema Document, whose parent element is an xs:simpleType
XSDUnion	An xs:union element in an XML Schema document
XSINamespaceSchema	This module constructs synthetically (that is, without reading an XML schema document) the schema components for the XML namespace