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The issue derives its name from the visual appearance of the model when it is drawn in an entity–relationship diagram, as the linked tables 'fan out' from the master table. This type of model resembles a star schema , which is a common design in data warehouses.
StarUML 2.0 uses its own file format with the .mdj extension. These are JSON text files. [9] The application can also export manually selected fragments of a model into separate files with having the .mdf extension and import them back. It can also import files from StarUML 1 which use the .uml format. StarUML can generate HTML, PDF and EJS ...
Consider a database of sales, perhaps from a store chain, classified by date, store and product. The image of the schema to the right is a star schema version of the sample schema provided in the snowflake schema article. Fact_Sales is the fact table and there are three dimension tables Dim_Date, Dim_Store and Dim_Product.
An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design.
The name of the view is mm. The domain hierarchy and constraints are also given. The constraints are expressed as sentences in the formal theory of the meta model. [8] There are several notations for data modeling.
File:Web Science MOOC Exercises Week 4.pdf. ... Click on a date/time to view the file as it appeared at that time. ... Version of PDF format: 1.4
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an Office suite; allows to export (and import, with accuracy limitations) PDF files. Microsoft Word 2013: Proprietary: Desktop software. The 2013 edition of Office allows PDF files to be converted into a format that can be edited. Nitro PDF Reader: Trialware: Text highlighting, draw lines and measure distances in PDF files. Nitro PDF Pro ...