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12	12	This microlearning centers around understanding the concept data modeling in design.
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14		-== 3. CDM, CDM & system message, message mapping ==
15		-By following the steps below, you should gain a better understanding of the differences between CDM, CDM messages, and system messages.
16		-
17		-== 3.1 Creating a CDM ==
	14	+== 3. Please complete the following steps ==
	15	+
	16	+
	17	+=== 3.1 Creating entities and attributes in your CDM ===
	18	+
18	18	Please add the following entities and attributes to your CDM:
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20	20	* Person, with attributes ID, Name, and Email
21	21	* PlatformCourse, with attributes ID and Name
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23		-
	23	+
24	24	One person has access to many platform courses. It should look like the following:
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26		-[[image:Main.Images.Usecase.WebHome@data-modeling-in-design-exercises--adding-attributes-entities-CDM.png]]
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28		-== 3.2 Creating a CDM message ==
29		-Now, go to your CDM message and add the Person and PlatformCourse to your message definition, including all attributes. It should look like the following:
30		-
31		-[[image:Main.Images.Usecase.WebHome@data-modeling-in-design-exercises--adding-message-definition-CDM-message.png]]
32		-
33		-== 3.3 Creating a system message ==
34		-In System message, create the following entities and attributes:
35		-
36		-* User, with attributes ID and Name
37		-* Course, with attributes ID and Name
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40		-One user has access to many courses. It should look like the following:
	29	+== 4. Assignment ==
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42		-[[image:Main.Images.Usecase.WebHome@data-modeling-in-design-exercises--adding-attributes-entities-system-message.png]]
	31	+Navigate to Design and open the message definition option of at least one integration within your project.
	32	+This assignment can be completed within the (Academy) project that you have created/used in the previous assignment.
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44		-Now, remove the attribute Name in Course by using the Toggle canvas edit mode. It should result in the following:
	34	+== 5. Key takeaways ==
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46		-[[image:Main.Images.Usecase.WebHome@data-modeling-in-design-exercises--remove-attribute-system-message.png]]
47		-
48		-== 3.4 Complete message mapping ==
	36	+* A message definition is a visual representation of how the elements are related to each other, whether they are mandatory and the data types they have that can be used in the message mapping
	37	+* Some message definitions are specific to a system. Others are generic across systems
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50		-Now that you have completed these steps, go to Message mapping and complete the mapping.
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52		-[[image:Main.Images.Usecase.WebHome@data-modeling-in-design-exercises--complete-message-mapping.png]]
53		-
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55		-== 4. Key takeaways ==
	41	+== 6. Suggested Additional Readings ==
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57		-* The CDM holds all entities and attributes that are relevant within the context of your complete integration landscape.
58		-* The CDM message is tailor-made for a specific piece of data and only holds the entities and attributes relevant for that piece of data.
59		-* A system message is specific to a system.
	43	+If you are interested in this topic and want more information on it please read the help text provided by eMagiz. Furthermore check out these links if you want a more in-depth knowledge of the eMagiz data models:
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	45	+* [API Gateway model](crashcourse-api-gateway-api-data-model.md)
	46	+* [Understanding the eMagiz CDM](crashcourse-messaging-what-is-cdm.md)
	47	+* [Event Streaming data model](intermediate-configuring-event-streaming-data-model.md)
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62		-== 5. Suggested Additional Readings ==
	49	+== 7. Silent demonstration video ==
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64		-If you are interested in this topic and want more information on it please read the help text provided by eMagiz.
	51	+This video demonstrates a working solution and how you can validate whether you have successfully completed the assignment.
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	53	+{{video attachment="crashcourse-platform-design-what-is-a-message-definition.mp4" reference="Main.Videos.Microlearning.WebHome"/}}
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68	68	)))((({{toc/}}))){{/container}}{{/container}}