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<s1 title="Migration">
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<s2 title="Migration Archive">
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<p>For migration information to &XercesCName; 2 series or earlier,
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<p>For migration information on earlier versions of &XercesCName; 2
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please refer to <link idref="migrate-archive-&XercesC3Series;">Migration Archive</link>.</p>
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<s2 title="Migrating from &XercesCName; 2 series to &XercesCName; &XercesC3Version;">
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<s2 title="Migrating from &XercesCName; 3.0.0 to &XercesCName; &XercesC3Version;">
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<p>The following section is a discussion of the technical differences between
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&XercesCName; 2 series and &XercesCName; &XercesC3Version;.</p>
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&XercesCName; 3.0.0 and &XercesCName; &XercesC3Version;.</p>
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<p>Topics discussed are:</p>
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<li><link anchor="NewFeatures300">New features in &XercesCName; &XercesC3Version;</link></li>
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<li><link anchor="API300">Public API Changes</link></li>
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<li><link anchor="NewAPI300">New Public API</link></li>
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<li><link anchor="ModifiedAPI300">Modified Public API</link></li>
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<li><link anchor="DeprecatedAPI300">Deprecated/Removed Public API</link></li>
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<anchor name="NewFeatures300"/>
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<s3 title="New features in &XercesCName; &XercesC3Version;">
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<li>Autotools-based build system for the UNIX/Linux/Mac OS X platforms</li>
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<li>Project files for VC++ 9</li>
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<li>Support for the ICU transcoder in VC++ 7.1, 8, and 9 project files</li>
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<li>libcurl-based net accessor</li>
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<li>Support for XInclude in DOM</li>
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<li>Support for both XPath 1 and XPath 2 models in the DOM XPath interface</li>
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<li>Support for the XML Schema subset of XPath 1 in DOM</li>
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<li>Conformance to the final DOM Level 3 interface specification</li>
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<li>Ability to provide custom DOM memory manager as well as tune the global DOM heap parameters</li>
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<li>All public and widely used interfaces as well as a large
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portion of the implementation were converted to be 64-bit safe.</li>
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<li>Various XML Schema fixes including the fix for the large
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maxOccurs and minOccurs bug as well as for the changed ##other
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<li>Reviewed and cleaned up diagnostics messages</li>
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<li>Optimizations for SAX/SAX2 and DOM parsing as well as XML Schema
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<li>Working multi-import support. The support for handling multiple import
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declarations with the same target namespaces has been improved and
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thoroughly tested. Furthermore, the same logic was extended to
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loadGrammar and the schemaLocation attributes so that you can load
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several schemas with the same namespace and/or "add" more declarations
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with the schemaLocation attributes. To enable this feature, set the
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XMLUni::fgXercesHandleMultipleImports feature/parameter to true.
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Starting with this release all the tests and examples have multi-import
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support enabled by default.</li>
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<li>New property, XMLUni::fgXercesLowWaterMark, allows to configure the
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parser buffer low water mark. In particular, setting this value to 0
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disables data caching in the parser which can be useful if you want
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the SAX events to be dispatched as soon as the data is available.</li>
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<li>DOMLSParser::parseWithContext implementation. In particular, this
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functionality allows one to parse a document fragment with missing
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namespace declarations as long as the context document provides them.</li>
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<li>Improved performance and reduced memory footprint when validating with
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large maxOccurs values. If available, the SSE2 instructions are used to
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further speedup this case.</li>
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<li>Improved scalability of the XML Schema identity checking (key, keyref,
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<li>Multiple XML Schema conformance fixes.</li>
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<li>More robust external library detection (libcurl and ICU). In particular,
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the build system no longer tries to inject any additional paths such as
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/usr or /usr/local.</li>
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<li>Compilation of the ICU message loader resources no longer depends on
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the ICU implementation details.</li>
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<anchor name="API300"/>
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<s3 title="Public API Changes">
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<p>&XercesCName; &XercesC3Version; is a major release and includes
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a number of application-breaking interface changes compared to
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&XercesCName; 2 series.
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The following sub-sections provide an overview of the public API
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changes between &XercesCName; 2 series and this release.</p>
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<anchor name="NewAPI300"/>
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<s4 title="New Public APIs">
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<li>XMLGrammarPoolImpl implementation has been moved to
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framework/ and is now publicly accessible</li>
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<li>DOM XPath interfaces now support XPath 2 model</li>
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<li>A number of DOM interfaces (DOMLSInput, DOMLSOuput,
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DOMLSParser, DOMLSSerializer, DOMConfiguration, etc.)
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were added as part of the the final DOM Level 3
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specification conformance work</li>
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<anchor name="ModifiedAPI300"/>
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<s4 title="Modified Public APIs">
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<p>A large number of public APIs have been modified. Consult
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individual interface documentation for details. The following
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list gives an overview of major changes:</p>
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<li>Several DOM interfaces have been adjusted to conform to the final
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DOM Level 3 specification</li>
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<li>DOM XPath interfaces have been adjusted to support both XPath 1
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<li>Many public interfaces that used int/long types to represent
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memory-related sizes, counts, indexes, etc., have been modified
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to use the 64-bit safe XMLSize_t type instead</li>
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<anchor name="DeprecatedAPI300"/>
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<s4 title="Deprecated/Removed Public APIs">
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<p>All APIs marked as deprecated in &XercesCName; 2 series have
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been removed in this release. In particular deprecated DOM
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(depdom) as well as COM support have been removed.</p>
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<p>Furthermore, a number of DOM interfaces (DOMBuilder, DOMWriter,
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DOMInputSource, etc.) were replaced as part of the the final
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DOM Level 3 specification conformance work.</p>
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<p>&XercesCName; &XercesC3Version; is a minor release and does
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not include any public API changes that would preclude
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applications using the previous version of &XercesCName; from
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building successfully with this version.</p>
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doc/migration.xml
