Net::Z3950::SimpleServer is a Perl module which implements the server side of the Z39.50 (information retrieval) protocol. It hides the complexity of network exchanges, packet serialization, and session handling. You are required only to implement simple callbacks to support searching and record retrieval. It is the basis of the "Zoogle" project, which is a Z39.50 gateway to the Google web index.
XMLDB uses an RDBMS to persist arbitrary XML documents. Due to its storage mechanism, searching for and recalling documents is extremely quick. You can also perform XSL translation on documents with surprising speed. The library can be used in any program to store libxml2 documents. A PHP module is also included, making XMLDB into a complete three-tier Web application development suite.
X-Hive/DB is a powerful native XML database designed for software developers who require advanced XML data processing and storage functionality within their applications. The comprehensive X-Hive/DB Java API contains methods for storing, querying, retrieving, transforming, and publishing XML data. X-Hive/DB supports all major W3C standards, such as XQuery, XPath, DOM, XPointer, XML Schemas, and more.
Emdros is a corpus query system for storing and searching linguistically annotated text. It is very generic, supporting almost any kind of annotation from almost any linguistic theory. All linguistic levels of analysis are supported, including phonology, morphology, the lexical level, syntax, and discourse. The core libraries act as a middleware layer between a client and an underlying SQL database. MySQL, PostgreSQL, and SQLite are supported.
The SODA Native XML Database System is a native XML database that provides efficient management of large amounts of XML data. It is based on a multi-user, client-server architecture with a generic query processing layer that can easily support different query languages. In this lightweight version, user- defined indexes and query optimizations have been removed, however full transaction support (commits and rollbacks) and crash recovery are available.
POPsearch is a desktop search engine that is designed to help you easily find information on your computer. With features that other search engines don't have,it lets you index your entire collection of email messages and files. As information is indexed, it is immediately available for analysis from any Web browser. When POPsearch is configured correctly, you can also access your data remotely with RSS feeds, email feeds, or from any computer that has a Web browser.
PhiloLogic is a full-text database engine developed for humanities computing text analysis by the ARTFL Project and the Digital Library Development Center at the University of Chicago. It is optimized for fast searching across very large collections of documents. It currently supports TEI-Lite, TEI XML, and TEI SGML documents.
Amberfish is a general purpose text/XML retrieval utility. It features indexing of both free text and nested fields, built-in support for XML documents, structured queries allowing generalized field/tag paths, hierarchical result sets, automatic searching across multiple databases, efficient indexing, and relatively low memory requirements.