Highlights from the 2.1 release include:
- Extensive interface improvements, including new search forms, built-in faceted browsing, and a new look and feel.Increased support for document and information exchange formats.
- XHTML and OAI-PMH outputNLM article format indexing and outputMicrosoft Word indexing
adaptation.Updated documentation that has been moved to the XTF project wiki, allowing XTF implementers to share solutions with entire user community."Freeform" Boolean query language, offered as an experimental feature.Backward compatibility with existing XTF implementations.
Since the first deployment of XTF in 2005, the development strategy has been to build and maintain an indexing and display technology that is not only customizable, but also draws upon tested components already in use by the digital library and search communities - in particular the Lucene text search engine, Java, XML, and XSLT. By coordinating these pieces in a single platform that can be used to create multiple unique applications, CDL has succeeded in dramatically reducing the investment in infrastructure, staff training and development for new digital content projects.
XTF offers a suite of customizable features that support diverse intellectual access to content. Interfaces can be designed to support the distinct tools and presentations that are useful and meaningful to specific audiences. In addition, XTF offers the following core features:
- Easy to deploy: Drops directly in to a Java application server such as Tomcat or Resin; has been tested on Solaris, Mac, Linux, and Windows operating systems.Easy to configure: Can create indexes on any XML element or attribute; entire presentation layer is customizable via XSLT.Robust: Optimized to perform well on large documents (e.g., a single text that exceeds 10MB of encoded text); scales to perform well on collections of millions of documents; provides full Unicode support.Extensible:
- Works well with a variety of authentication systems (e.g., IP address lists, LDAP, Shibboleth).Provides an interface for external data lookups to support thesaurus-based term expansion, recommender systems, etc.Can power other digital library services (e.g., XTF contains an OAI-PMH data provider that allows others to harvest metadata, and an SRU interface that exposes searches to federated search engines).Can be deployed as separate, modular pieces of a third-party system (e.g., the module that displays snippets of matching text).
- Spell checking of queriesFaceted displays for browsingDynamically updated browse listsSession-based bookbags
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