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May 08, 2008

A proposed standard for enterprise search

Dieselpoint has announced support for a technology it calls OpenPipeline, which can enhance the task virtually every enterprise search technology uses to get documents into the search index. They will be showing the pipeline at the upcoming Enterprise Search Summit on May 20-21 integrated with their new Dieselpoint Search 4.0, also on display.

The Dieselpoint press release claims:

OpenPipeline provides a common architecture for connectors to data sources, file filters, text analyzers and modules to distribute documents across a network. It is fully functional out of the box and includes an installer, a job scheduler, file scanner and crawlers, doc filters, and point and click interface with drag and drop module installation.

OpenPipeline is compatible with IBM's UIMA (Unstructured Information Management Architecture), and is designed to connect UIMA annotators to other systems.

Document processing can be centralized or parallelized as needed. The transport mechanism is simple, web-services XML over HTTP. RSS/Atom feeds are also possible.

The development philosophy behind OpenPipeline stresses simple, elegant design, and massive scalability. Minimal external dependencies and straightforward plug-in implementation ensure that the learning curve is low.

OpenPipeline can be downloaded without charge from http://www.OpenPipeline.org. It's available under the Apache License.


Making this technology open source makes sense. The core technology for an enterprise search company, their 'secret sauce', is optimizing the index and making search great, not creating new code to parse the latest version of Microsoft Office or of Documentum. By embracing OpenPipeline, presumably we will start to see pipeline stages created by a number of smaller companies and individuals, easing the burden on enterprise search companies. And companies that provide possible sources of data like Content Management Systems, can create a single pipeline stage for their product that could work for every search technology, and be done with it.

To create a searchable index, all search technologies need to create a stream of text. If the source document is a binary file - Microsoft Word, for example - search vendors need to provide some way to read the format and convert it to text. The same is true of content stored in a relational database: each row represents a virtual document which needs to be extracted from the database and turned into a stream of text. This conversion is typically done as one stage of a pipeline. Other stages may include adding metadata, performing entity or sentiment extraction, or even enhanced language processing.

The concept of a 'pipeline' applies directly to many existing search technologies, each with a proprietary method of accessing content. On top of that, no search technology companies have cooperated with competitors to create standards. In the relational database world, standards have made life much better: consider ODBC and JDBC. Because of these standards, developers can write code that can connect to just about any relational database. Not so in search. Maybe this effort will help break the ice. Stay tuned...

As enterprise search users, are you glad to see an open source solution for part of the search puzzle?

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