Need tips to build a Logical data model

Hey Gurus,
1) I need some tips in building a logical data model.
I have reviewed a functional spec and listed all the fields required in a report. I now looked into datasources( extractor) in R/3 side which can bring most of these fields but there are certain characteristices which are not part of this extractor, what i have found out is that they are the attributes of a master Data <u>but there are still some more fileds which are not part of the extractor and attributes of a master data</u> , so now how do i bring the data for those fieds????? <b>Do I have to enhance the extractor or do i need to enhance the Masterdata???????</b>
How do i decide whether to enhance the extractor or the Master data?? Experts please give me some tips out of ur experiences so that i can decide on what to enhance.
2) Assume that i have an extractor which can bring me all the fileds required in a report. Now how do i build a logical data model????????
is it like
Replication Transformation/DTP Transformation/DTP
DS-->PSA> ODS--
>IC
Am I right else correct me gurus.
Will surely award points.
thanks.

1. Use XML Spy Enterprise edition editor.
2. Goto www.xmethods.com, select service you want to create demo of.
3. Get its WSDL url.
4. In XML Spy SOAP menu there is a command 'create new soap request'. Press that, enter the WSDL url. You will get a SOAP request.
5. Edit SOAP request parameters. Type parameters of your choice.
6. Press 'send request to server'. You will get SOAP response. It will contain result from the requested method.
7. Paste that response inside a JSP.
8. Write a local method which will return same response (remote method's return value) that came from remote web service.
9. Paste that method inside abovementioned JSP. Replace static response in that JSP with the response generated by local method. The method parameters will come from client's SOAP request. Parse SOAP request to get request parameters. (As it's your demo, you know the data types of the parameters).
10. Host that JSP on any Servlet/JSP engine.
That makes your Web Service.
You can use any package like Aapche SOAP, AXIS or JAX-RPC to generate a SOAP client. Use the URL of JSP(step 10) as "endpoint".
Note: Indside JSP make sure that there in no endline and carriage return character. Otherwise it won't be a valid SOAP response.
Good luck.

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Hi,
I donno exactly this is the correct forum for this question. I believe there are database experts here to help me on this.
I am in confusion that, phsically the data can be saved in a set of tables (4-5 tables). But different views (User Interfaces) and reports can be created from these tables.
Assume that,
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How exactly do we need to identify the entities for Logical Data Model?
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Thanks & Regards
M Thiyagu

sorry, i couldnt understand your query..
thanks,
baskar.l

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I have been struggling with this thing and I am looking for some help from anyone on this forum.
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Hi,
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yes,
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[email protected]

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Hello,
I am trying to create a logical data model where the following rules are applied:
Each Renovation Job may include one or more Rooms.
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Each Renovation Job may include one or more Rooms.
Entities - Renovation Job Room, Room Renovation (intersection between Renovation Job & Room)
Each Room can be included in one or more Renovation Jobs.
Covered by Room Renovation
Each Room Renovation may have one or more Renovation Types
Entities - Renovation Type, Renovation Room Type
Each Renovation Type may be associated with one or more Room Renovations
Covered by Renovation Room Type
There are repeating groups in "Renovation_room_type" table (Renovation_job + Room_codes)That's just your foreign key to Room Renovation, isn't it?
You said that each renovation type may be associated with one or more room renovations.

Logical data model

hi
I am currently making a white paper on rdbms and logical data models. Can anyone point from where can I get a logical data model for the telecommunication industry for data warehousing purposes ???
regards
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Bye Alessandro

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Hi,
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User,
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Oracle 10gR2 Designer is also availble at: http://www.oracle.com/technology/software/products/designer/htdocs/winsoft.html
Good luck.
Edited by: kumper on 2008-10-16 00:33

Logical Data Model Vs Physical Data Model

Hi guys, what is the difference between, logical data model and physical data model.

Duplicate Thread:
Logical Vs Physical Data Model
Daljit Singh

Want to build OBIEE compatible data model.

Hi Experts,
I want to design a data model which i use with OBIEE. Mainly my reports contain different metrics compared over time. Can any one give me some suggestions or web references that help me in building a strong data model. Sorry if this is a big topic to discuss........any web references you know will help me a lot.
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Thanks Stijn,
but there are several books written by Kimball...........which one of the below you prefer??
The Data Warehouse Toolkit: The Complete Guide to Dimensional Modeling
http://www.amazon.com/Data-Warehouse-Toolkit-Complete-Dimensional/dp/0471200247/ref=sr_1_1?ie=UTF8&s=books&qid=1279297864&sr=8-1
The Data Warehouse Lifecycle Toolkit
http://www.amazon.com/Data-Warehouse-Lifecycle-Toolkit/dp/0470149779/ref=sr_1_9?ie=UTF8&s=books&qid=1279297864&sr=8-9
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Hi All,
Can anybody through some light on what is a logical data model, how it should be
created?
Please share documents if any.
Regards,
Pramod

Hello Pramod,
you can refer the below links for data modeling:
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5d4211fa-0301-0010-9fb1-ef1fd91719b6
http://www.sap.info/public/INT/int/index/Category-28943c61b1e60d84b-int/0/articlesVersions-31279471c9758576df
Regarding the Logical Data Modeling, you can refer the below link for basic understanding:
http://en.wikipedia.org/wiki/Logical_data_model
Hope this will help you.
TNR,
Saurabh...
Reward if found useful.
Edited by: Saurabh Kumar Sahu on Jul 28, 2008 10:11 AM

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Hello,
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Entity1 has the abbreviation ( PRUE) and entity1 has three atributes ( PRUE_PPPPPP, PRUE_OOOOO).
when I make engineering the columns resulting in entity2 and entity3 are PRUE_PRUE_PPPPPP and PRUE_PRUE_OOOOO
I have unchecked the options apply translations of names and preferred use abbreviations in general options (engineering)
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¿Any help?

Hello,
version 4.0.0.820.
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Thanks

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I’m currently at a client where we’re using Oracle SQL Developer Data Modeler to design our Logical Data Models (as part of an overall deliverable).
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Hi Kent,
When I looked at this option, I was expecting to see a "|" and/or "O" in front of the crow's feet. I was not expecting to see a dashed line. Now I know...
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Hi guys
What is the difference between logical data model and physical data model.

I assume you are talking about ERwin.
In short,
Logical data model is non-database specific model you can apply it to any database by convert it to target physical data model.
Physical data model is database specific, for example, column data type, physical storage parameter, SQL syntax etc.

Need tips to build a Logical data model

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