Introduction to Semantic Layers

The semantic layer is a metadata layer that abstracts the complexities of the data source. The end user sees only a logical grouping of available, well-named fields for use and does not have to concern herself with the intricacies of database design or need any SQL knowledge.

In Business Objects XI, two semantic layers are supportedbusiness views and universes. With the merging of Crystal Decisions and Business Objects, a decision was made to keep business views from Crystal Decisions and universes from Business Objects. The author predicts that in future releases there will be only one supported semantic layer that will have the best components of both products. Currently, however, Business Objects has made a commitment to support both business views and universes.