IBM Db2 Mirror for i enables continuous availability for your mission-critical applications.
Frequently Asked Questions for Db2 Web Query.
Db2 for i Frequently Asked Questions
This paper explores the IBM Db2 for i indexing technology — the IBM OmniFind Text Search Server. This paper introduces you to the OmniFind text-indexing technology and how it compares with traditional database index technologies. In addition, the paper discusses how applications that are developed in any language can use SQL to perform text searches against simple text data stored in Db2 databases, business data encapsulated in XML documents, and data stored in rich-text document formats such as Adobe PDF or Microsoft Word.
This IBM Support web site is a great starting point for Db2 for i. It provides an introduction to Db2 for i and has many links to additional information.