What is 'common warehouse metamodel' in SAP BW - SAP Business Information Warehouse?

common warehouse metamodel - Overview

• Component: BW

• Component Name: SAP Business Information Warehouse

• Description: Common Warehouse Metamodel A standard that is recognized by the Object Management Group OMG and that describes the exchange of metadata in the following areas: Data Warehousing Business Intelligence Knowledge Management Portal technology CWM uses UML to model metadata MOF to access metadata XMI to exchange metadata You can find the current CWM specification on the OMG home page.

common warehouse metamodel - Details

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  Key Concepts: 
  The Common Warehouse Metamodel (CWM) is a data model used in SAP Business Information Warehouse (BW) to define the structure of data warehouses. It is based on the concept of a star schema, which is a type of database schema that organizes data into facts and dimensions. CWM provides a standard way to store and access data in BW, allowing for easier integration with other systems.
  
  How to use it: 
  The CWM is used to define the structure of a data warehouse in BW. It consists of three main components: facts, dimensions, and hierarchies. Facts are the numerical values that are stored in the warehouse, such as sales figures or inventory levels. Dimensions are the categories that facts are grouped into, such as product type or region. Hierarchies are the relationships between different levels of dimensions, such as product category and product type. 
  
  Tips & Tricks: 
  When designing a data warehouse using CWM, it is important to consider how the data will be used. This will help ensure that the structure of the warehouse is optimized for the intended purpose. Additionally, it is important to consider how the data will be accessed and updated, as this will affect how it is stored in the warehouse. 
  
  Related Information: 
  The CWM is based on the concept of a star schema, which is a type of database