Support for those systems will be provided via "connector" modules included with this enterprise search device's Version 5.0 software, which existing customers will be able to download for free either this week or next week.

The modules were built on an open-source framework that is new in Version 5.0 and that can be used by customers and other vendors to create other native ECM connector modules for the Search Appliance.

This complements already existing native support for enterprise databases and enterprise applications in the Search Appliance, said Nitin Mangtani, lead product manager for search in the Google Enterprise division.

With the ECM framework and modules, Google is introducing in the Search Appliance the concept of universal search, which refers to a search engines's ability to merge items from a broad variety of data repositories in a single results list.

In the Search Appliance -- a computer with search engine software -- this will be manifested by its ability to return links to files and Web pages from intranets, on-premise and hosted business applications, corporate directories, public sites and, now, ECM systems.

Google, which generates most of its revenue from advertising delivered via its consumer-oriented search engines and a network of third-party Web sites, also makes "enterprise" products meant for use by organizations in workplaces.

The Search Appliance, which is one such enterprise product, can be used by organizations to index a wide variety of files and documents in their intranets and corporate servers, and make them searchable by authorized employees, clients and partners.

As such, the Search Appliance competes against other enterprise search products from companies like Autonomy, Vivisimo and Fast Search & Transfer.

In this market, the Search Appliance seems mostly used for simpler implementations focusing on a single data repository or file system, while complex projects often go to rivals like Autonomy, Fast and others, said Forrester Research analyst Matt Brown.

That said, by delivering significant enhancements in version 5.0 at no extra charge, Google boosts its strategy for attracting customers with a product that is generally easier to use and install, as well as less expensive than its competitors, Brown said.

"Version 5.0 goes to Google's continued efforts to commoditize the search function in enterprises," Brown said.

Version 5.0 will also include security enhancements like support for Windows Integrated Authentication (WIA) and improved performance in its Security Assertion Markup Language-based API for authentication and authorization.