Fixed a bug where the stream opened to read resolver properties might be unclosed. This closes issue 208.

This release restores the NamespaceResolver API. This API is deprecated, but improves backwards compatibility with version 5.x.

This release removes two dependencies: the SLF4J API and the Apache HTTP Client API. This has no user-visible changes in the API, but makes version 6.x of the resolver a drop-in replacement for version 5.x in most cases.

The following changes are included:

Improvements to support for UNC paths

Documents and catalogs that use Windows UNC paths are better supported if the FIX_WINDOWS_SYSTEM_IDENTIFIERS feature is enabled.

Support for Java 21

The build still produces class (and jar) files that will work with any version of Java back to Java 8. However, the build itself now uses Java 21. This closes issue 173.

Refactor the SAX entity resolvers

The SAX EntityResolver and EntityResolver2 interfaces are now implemented on separate objects. This closes issue 183.

Fix namespace-based lookup in the DOM

The LSResourceAdapter API used when resolving documents for the DOM did not correctly handle XML Schema validation. It was failing to lookup based on the namespace. This closes issue 180.

Improved support for concurrency

The catalog lookup code was not sufficiently careful about multi-threaded access. My thanks to JFK-DXML for the patch. This closes issue 182.

Reworked the FIX_WINDOWS_SYSTEM_IDENTIFIERS feature

This feature now applies irrespective of platform. This will enable Windows documents and catalogs to work correctly even on non-Windows systems. This closes issue 184.

A number of smaller issues (testing and build system issues and issues not expected to be user visible) have also been corrected. See the commit log for more details.

Apparently version 6.0.5 was never released.