====== Business Object Notation (BON) ======

  * See [[:eiffel:bon:start|here]] for a short description of BON.
  * [[http://www.bon-method.com/index_normal.htm|BON]] - Business Object Notation. The BON method for analysis and design of object-oriented software is a means of extending the higher-level concepts of the Eiffel programming language into the realm of analysis and design aided by a graphical notation akin to but different from UML.
  * [[https://www.eiffel.org/doc/eiffelstudio/Diagram%20tool|Using the EiffelStudio/BON diagram tool]]


====== Create a BON diagram with draw.io ======

{{ :eiffel:faq:faq:eecs3311_bon_lib.xml.zip |BON Template}}

  - Download and unzip the above BON Template.
  - Go to [[https://www.draw.io|draw.io]] and create a new drawing (backup site: [[https://www.eecs.yorku.ca/~eiffel/draw/|draw@eecs]]). You can also download it as an app. 
  - Import the BON template via File => New Library:


{{:eiffel:faq:faq:draw1.png|}}

===== Use the Template for Detailed or Compressed Classes =====


Now use the template to draw the BON diagram

{{:eiffel:faq:faq:bank.png|}}

==== Relationships between classes ====

  * Inheritance: Red Arrow
  * Client Supplier (Green Arrow)
    * Reference (Association)
    * Expanded  (Composition/Aggregation)


===== Documentation =====

To include your BON diagram in your Word (MS Office) document, Export (and crop) as PDF. Drag and drop the resulting PDF into your Word document for a clear (and non-fuzzy) image at any resolution.

{{ :eiffel:faq:faq:system.pdf |PDF}}

===== Maths Symbols for Contracting =====


Notice that the template has a variety of Maths symbols for contracting

{{:eiffel:faq:faq:maths.png|}}