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## com.saxonica.schema.sdoc
Class SchemaReader

    java.lang.Object
      com.saxonica.schema.sdoc.SchemaReader

    public abstract class SchemaReader

extends Object

A class for reading XML Schema documents. The class is not instantiated, its methods are static.

Method Summary
`static SchemaDocument` | `buildSchemaDocument(Source source, SchemaCompiler compiler, PipelineConfiguration pipe, SchemaElement referrer)` Build the tree representation of a schema document, without doing any processing or XSD-specific validation of the content
`static Source` | `getSource(String baseURI, String relativeURI, PipelineConfiguration pipe, String targetNamespace)` Resolve and dereference a URI to get a Source object representing a schema document
`static Source[]` | `getSources(String baseURI, String[] relativeURIs, PipelineConfiguration pipe, String targetNamespace)` Resolve and dereference a set of URIs to get a set of Source objects representing schema documents
`static SchemaDocument` | `read(Source source, SchemaCompiler compiler, PipelineConfiguration pipe, SchemaElement referrer)` Read the Schema from a source XML document and returns the Schema document.

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

Method Detail

### getSource

    public static Source getSource(String baseURI,
                                   String relativeURI,
                                   PipelineConfiguration pipe,
                                   String targetNamespace)
                            throws SchemaException

  Resolve and dereference a URI to get a Source object representing a schema document

  Parameters:
    `baseURI` - the base URI
    `relativeURI` - the URI to be resolved relative to the base URI
    `pipe` - the pipeline configuration (which may define a URIResolver to be used)
    `targetNamespace` - the targetNamespace of the schema document required (this is set to null when doing an include or redefine, because in those cases the targetNamespace cannot be used to locate the schema document)
  Returns:
    the JAXP Source object representing the deferenced URI, or null if no source could be located
  Throws:
    `SchemaException` - if any errors occur

### getSources

    public static Source[] getSources(String baseURI,
                                      String[] relativeURIs,
                                      PipelineConfiguration pipe,
                                      String targetNamespace)
                               throws SchemaException

  Resolve and dereference a set of URIs to get a set of Source objects representing schema documents

  Parameters:
    `baseURI` - the base URI
    `relativeURIs` - the URIs (location hints) to be resolved relative to the base URI
    `pipe` - the pipeline configuration (which may define a URIResolver to be used)
    `targetNamespace` - the targetNamespace of the schema document required (this is set to null when doing an include or redefine, because in those cases the targetNamespace cannot be used to locate the schema document)
  Returns:
    the JAXP Source object representing the deferenced URI
  Throws:
    `SchemaException` - if any errors occur

### read

    public static SchemaDocument read(Source source,
                                      SchemaCompiler compiler,
                                      PipelineConfiguration pipe,
                                      SchemaElement referrer)
                               throws SchemaException

  Read the Schema from a source XML document and returns the Schema document. The schema document is validated against the XML Representation Constraints, but the resulting schema components are not validated against schema component constraints: this must be done by the caller after all schema components are assembled, by calling `SchemaCompiler.validate(com.saxonica.schema.sdoc.SchemaDocument)`

  Parameters:
    `source` - the JAXP Source containing the schema document
    `compiler` - used for tracking source documents read, and for error reporting
    `pipe` - the pipeline configuration
    `referrer` - if the schema document is referenced from an xs:import, xs:include, or xs:redefined, this parameter identifies that element; otherwise, null.
  Returns:
    the new Schema created from the source of this SchemaReader
  Throws:
    `SchemaException` - if the schema module can't be read or parsed, or if the schema module is an invalid schema

### buildSchemaDocument

    public static SchemaDocument buildSchemaDocument(Source source,
                                                     SchemaCompiler compiler,
                                                     PipelineConfiguration pipe,
                                                     SchemaElement referrer)
                                              throws SchemaException

  Build the tree representation of a schema document, without doing any processing or XSD-specific validation of the content

  Parameters:
    `source` - the source of the module
    `compiler` - the SchemaCompiler (holds configuration information and keeps track of errors)
    `pipe` - the Pipeline Configuration
    `referrer` - the xs:import or xs:include element, etc, that requested processing of this module
  Returns:
    the root Document node of the tree containing the schema document
  Throws:
    `SchemaException` - if XML parsing or tree construction fails

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Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.