The Business Objects Universe is a semantic data model or layer between users and database ( that stores organization data ). In Business Objects terminology its a semantic layer which contains Objects ( dimension, detail and measure), Classes and which depicts Organization data store using Business Terminology to ease reporting.
Classes : A class is nothing but a logical grouping of a related objects. Name of the class describes the object it contains.
Objects: Object is nothing but a names entity that’s maps to the column of a underlying data source table.
While naming the Classes and Objects one should use Business Terminology as these are the things which gets exposed to report users and they only understand Business Terms.
e.g. instead of naming an objects as YEAR_REVENUE you should name it as “Yearly Revenue”
Advantages of Universe or Semantic Layer
1. The places an layer between database and business uers and presents database/data warehouse in Business Terminologies which makes easy for them to create a report.
2. Universe allows user to have no knowledge of SQL only developer needs to know the SQL. Business User can simply drag drop the objects and the tool will generate the required query to fetch the data.
3. All types and security can be applied on Universe making it data secure and only available to related person.
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