The Acumen software design blog provides you with helpful articles about SSAS.

Several web sites provide a good overview.

Official Microsoft SSAS Overview

SSAS Wikipedia

SSAS - Attribute Hierarchies Error

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SQL In his excellent book, Star Schema, Christopher Adamson begins Chapter 7, "Hierarchies and Snowflakes," with the following language: It is possible to describe a dimension table as a series of parent-child relationships among groups…