The xmlresolver project provides an advanced implementation of the SAX EntityResolver, the Transformer URIResolver, and a new NamespaceResolver. The implementation uses the OASIS XML Catalogs V1.1 Standard to provide a mapping from public identifiers to local resources.
In addition to enhanced support for RDDL-based namespace resolution, the implementation supports automatic local caching of resources. This provides the advantages of the catalog specification without requiring users to manage the mapping by hand.
Applications can use the resolver directly or they can instantiate one of a set of convenience classes to access parsers that automatically implement these resolvers.
The goal of this project is to produce a clean, reasonably simple API and a robust, thread-safe implementation. At this time, the code is probably neither completely baked nor entirely robust. Please consider it "beta" for the time being.