9/21/2007

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Even the richest content has limited value unless the metadata is available in a readily shared form. All CM tools provide some metadata management capability, but there is still a lot of differentiation in richness of such metadata, and how readily it's shared.

The most effective tools use semantic technology, which is designed for sharing rich metadata across software domains. To help standardize such approaches, many leading CM and publishing companies came together to create a format specification for sharing rich metadata, Publishing Requirements for Industry Standard Metadata (PRISM). (For more information, go to prismstandard.org).

PRISM builds on semantic technology such as RDF and Dublin Core, but it focuses on needs throughout the content lifecycle, providing a metadata framework, industry standard controlled vocabularies for semantic sharing across organizations, and guidelines for extensibility in custom CM situations. PRISM 1.0 was completed in 2001, and the working group has recently completed a 2.0 specification, pending a public comments period, which just closed. The plan is to finalize PRISM 2.0 this month. PRISM 2.0 is a major update that expands the expressiveness available through built-in constructs. It also defines metadata formats in XMP as well as XML and RDF, which brings rich, sharable metadata directly into multimedia objects.

There's no guarantee that your CM vendors will be moving quickly to PRISM 2.0, and for the most part PRISM 1.0 provides rich enough metadata for many CM needs. More important than specific format is the general capability to reference unstructured data in its fullest context. If your present tools don't provide this, you might want to focus integration projects on lightweight layers that open up and expand content metadata building on whatever crude export you have available. PRISM 2.0 is easy enough to use in such a home-grown scenario, and will probably buy you better alignment with the CM industry over time.

Semantic technology applications such as PRISM bring a reference section to the library function at the heart of the content lifecycle, and the right tools and processes allow you to develop the reference section in tandem with the library, improving accuracy and coverage. Content enhanced in this way is easier to integrate into other systems, more easily reused, and so more valuable in general.

Uche Ogbuji specializes in the integration of next-generation web systems. He is a partner at Zepheira, which provides solutions to integrate, navigate, and manage information across personal, group, and enterprise boundaries to save time and money.

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