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Books for 70-300

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2tenPM Guest	Posted: Fri Oct 01, 2004 4:30 am    Post subject: Books for 70-300 Hey there, I plan on sitting the 70-300 in one months time. I have little to no experience in using .NET technologies but am a proficient programming in languages such as Java and C. I have trying to decide which book to get to aid my learning. I have looked in local book stores for the Exam Cram 2 book as this is what most people seem to recommend. No-one has it! The closest I got was: MCSD Analyzing Requirements and Defining .NET Solutions Architectures Study Guide (Exam 70-300 (Certification Press) by: Scott Duffy David Waddleton Has anyone out there actually read this book? Was it good? Or, should I just wait for two weeks for the local book stores to get the Exam Cram 2 book in ...?
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Saga Guest	Posted: Fri Oct 01, 2004 3:30 pm    Post subject: Re: Books for 70-300 I have the book in question (MacGraw-Hill/Osbonre) and am reading it. So far so good, no complaints. The exam cram was also recommended, so I plan on getting that too. I have always made it a point to not depend on only one source of information. Good luck! Saga "2tenPM" <twotenpm@hotmail.com> wrote in message news:29ba01c4a76a$4b32f820$a601280a@phx.gbl... Quote: Hey there, I plan on sitting the 70-300 in one months time. I have little to no experience in using .NET technologies but am a proficient programming in languages such as Java and C. I have trying to decide which book to get to aid my learning. I have looked in local book stores for the Exam Cram 2 book as this is what most people seem to recommend. No-one has it! The closest I got was: MCSD Analyzing Requirements and Defining .NET Solutions Architectures Study Guide (Exam 70-300 (Certification Press) by: Scott Duffy David Waddleton Has anyone out there actually read this book? Was it good? Or, should I just wait for two weeks for the local book stores to get the Exam Cram 2 book in ...?
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Patrick Dickey--MSN Beta Guest	Posted: Fri Oct 01, 2004 4:31 pm    Post subject: Re: Books for 70-300 Why not get both books? First of all, if you wait until they get the book in, you WILL cram for the test..Chances are, you may do awesome on it, but won't remember sh*t from the information. And, what happens if the book doesn't come in? Then, you either have to hold off on taking the test, or buy this one anyhow. However, if you get the book now, and start reading it, then get the Exam Cram book, you'll have a better chance of actually 'knowing' the material, instead of just spewing it out on a test. Probably will do better on the test also;) Patrick. -- Smile... Someone out there cares deeply for you... "2tenPM" <twotenpm@hotmail.com> wrote in message news:29ba01c4a76a$4b32f820$a601280a@phx.gbl... Quote: Hey there, I plan on sitting the 70-300 in one months time. I have little to no experience in using .NET technologies but am a proficient programming in languages such as Java and C. I have trying to decide which book to get to aid my learning. I have looked in local book stores for the Exam Cram 2 book as this is what most people seem to recommend. No-one has it! The closest I got was: MCSD Analyzing Requirements and Defining .NET Solutions Architectures Study Guide (Exam 70-300 (Certification Press) by: Scott Duffy David Waddleton Has anyone out there actually read this book? Was it good? Or, should I just wait for two weeks for the local book stores to get the Exam Cram 2 book in ...?
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UAError Guest	Posted: Fri Oct 01, 2004 8:30 pm    Post subject: Re: Books for 70-300 "2tenPM" <twotenpm@hotmail.com> wrote: Quote: Hey there, I plan on sitting the 70-300 in one months time. I have little to no experience in using .NET technologies but am a proficient programming in languages such as Java and C. I have trying to decide which book to get to aid my learning. I have looked in local book stores for the Exam Cram 2 book as this is what most people seem to recommend. No-one has it! The closest I got was: MCSD Analyzing Requirements and Defining .NET Solutions Architectures Study Guide (Exam 70-300 (Certification Press) by: Scott Duffy David Waddleton Has anyone out there actually read this book? Was it good? Or, should I just wait for two weeks for the local book stores to get the Exam Cram 2 book in ...? The ExamCram2 book isn't a book you learn anything from. Its a tool to assess your readiness, to identify any potential holes in your knowledge - it then provides references after each chapter to flesh out your knowledge in case you are lacking. There are also two Case studies in the back to give you a taste of the type of questions you must expect - the chapter on how to approach a case study is also of some use. See here for my rantings on the conceptual design chapter: http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&selm=jh9th0dsru25fb5u7jm7kqq601ffpcbj8m%404ax.com&rnum=1 And while you are waiting for your copy to arrive, here are some of the microsoft/msdn references it uses - a month may not be enough: The .NET Show: http://msdn.microsoft.com/theshow/Archive.asp ..NET Architecture home page http://msdn.microsoft.com/architecture Patterns And Practices home page http://www.microsoft.com/resources/practices/default.mspx Application Architecture http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnanchor/html/Anch_EntDevAppArch.asp Application Architecture for .NET: Designing Applications and Services http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/distapp.asp http://www.microsoft.com/downloads/details.aspx?FamilyId=A08E4A09-7AE3-4942-B466-CC778A3BAB34&displaylang=en Designing Distributed Applications with Visual Studio .NET - Infrastructure Technologies http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconInfrastructureTechnologies.asp Design Guidelines for Class Library Developers http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpgenref/html/cpconNetFrameworkDesignGuidelines.asp Deploying .NET Applications: Lifecycle Guide http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/dalgroadmap.asp Visual Studio 6.0 - Developing for the Enterprise http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsintro/html/veovrwhatsnewinvisualstudioenterpriseedition.asp Monitoring in .NET Distributed Application Design http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/monitordotnet.asp Building an n-Tier Applications in .NET http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/buildntierapp.asp Sql Server home page http://www.microsoft.com/sql/default.asp Microsoft Solutions Framework homepage http://msdn.microsoft.com/vstudio/enterprise/msf/ Microsoft Solution Accelerator for Internet Storefront The Envisioning Phase http://msdn.microsoft.com/library/en-us/dnsolac/html/mo3_envphase.asp Defining The Vision http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnservice/html/service01102001.asp Unix Code Migration Guide: Chapter 3: "The Migration Process" http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnucmg/html/UCMGch03.asp Lessons From the Mainframe era http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlpro2k/html/sql00b15.asp Microsoft Global Software Development http://www.microsoft.com/globaldev/default.mspx Designing Accessible Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconDesigningAccessibleApplications.asp Certified for Windows Program http://www.microsoft.com/windowsserver2003/partners/isvs/cfw.mspx Performance Needs: Users and Administrators http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/performance_needs_users_and_administrators_2.asp Microsoft Windows NT High Availability Operations Guide: Implementing Systems for Reliability and Availability http://www.microsoft.com/NTServer/techresources/deployment/NTServer/HighAvail2.asp Reliabilty http://www.microsoft.com/technet/itsolutions/reliable/default.mspx Best Practices for Globalization and Localization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconbestglobalizationpractices.asp Building Secure ASP.NET Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/secnetlpMSDN.asp http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=055FF772-97FE-41B8-A58C-BF9C6593F25E 10 Immutable Laws of Security http://www.microsoft.com/technet/archive/community/columns/security/essays/10imlaws.mspx Best Practices for Enterprise Security http://www.microsoft.com/technet/archive/security/bestprac/bpent/bpentsec.mspx Web Services Specifications Index Page http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnglobspec/html/wsspecsover.asp Web Services Security Specifications Index Page http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnglobspec/html/wssecurspecindex.asp Planning for Integration with Existing Systems http://msdn.microsoft.com/library/default.asp?url=/library/en-us/comsrv2k/htm/cs_gs_planning_zncf.asp Volume Licensing Briefs Downloads http://www.microsoft.com/licensing/resources/volbrief.mspx Object Role Modeling, An Overview http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchvsea_ormoverview.asp Object Role Modeling (ORM) http://msdn.microsoft.com/theshow/Episode025/default.asp Visio-Based Database Modeling in Visual Studio .NET Enterprise http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvisio02/html/visdbcomp.asp Step-by-Step Guide to Reverse Engineering a Database in Visio 2000 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvisio00/html/VsRvEng.asp When All you want is an ER Diagram http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlpro01/html/sql01h1.asp ..NET Interop: Get Ready for Microsoft .NET by Using Wrappers to Interact with COM-based Applications http://msdn.microsoft.com/msdnmag/issues/01/08/Interop/default.aspx Production Debugging for .NET Framework Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/dbgrm.asp Return of the Rich Client http://msdn.microsoft.com/msdnmag/issues/02/06/rich/ Exception Management in .NET http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/exceptdotnet.asp Author XML Schemas http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmtuttut6authoringschemas.asp Data Normalization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxcondatanormalization.asp Responsible Denormalization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlmag2k/html/ResponsibleDenormalization.asp Designing the Components of an Application or Service http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/AppArchCh2.asp Designing Federated Database Servers http://msdn.microsoft.com/library/default.asp?url=/library/en-us/optimsql/cm_fedserv_4uib.asp Overview of System Performance http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/bdadotnetarch08.asp Microsoft Windows Management Instrumentation http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmi/html/msdn_wmiwp.asp Enterprise Templates: Building an Application Construction Kit http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchEnterpriseTemplatesBuildingApplicationConstructionKit.asp Enterprise Templates for Distributed Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxoriEnterpriseTemplates.asp FxCop http://www.gotdotnet.com/team/fxcop/
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TomTom Guest	Posted: Mon Oct 04, 2004 7:30 am    Post subject: Re: Books for 70-300 I had your suggestion and read the book and web sites written by Terry Halpin on ORM. I took the test and I failed (and I am not blaming anyone). In ORM, are there cases where an object is a child of object and vice versa? In the book and web site, I didn't see those cases and I am confused. "UAError" <null@null.null> wrote in message news:uobrl0prhqpmc1j93sv5rt8rknh423t7p1@4ax.com... Quote: "2tenPM" <twotenpm@hotmail.com> wrote: Hey there, I plan on sitting the 70-300 in one months time. I have little to no experience in using .NET technologies but am a proficient programming in languages such as Java and C. I have trying to decide which book to get to aid my learning. I have looked in local book stores for the Exam Cram 2 book as this is what most people seem to recommend. No-one has it! The closest I got was: MCSD Analyzing Requirements and Defining .NET Solutions Architectures Study Guide (Exam 70-300 (Certification Press) by: Scott Duffy David Waddleton Has anyone out there actually read this book? Was it good? Or, should I just wait for two weeks for the local book stores to get the Exam Cram 2 book in ...? The ExamCram2 book isn't a book you learn anything from. Its a tool to assess your readiness, to identify any potential holes in your knowledge - it then provides references after each chapter to flesh out your knowledge in case you are lacking. There are also two Case studies in the back to give you a taste of the type of questions you must expect - the chapter on how to approach a case study is also of some use. See here for my rantings on the conceptual design chapter: http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&selm=jh9th0dsru25fb5u7jm7kqq601ffpcbj8m%404ax.com&rnum=1 And while you are waiting for your copy to arrive, here are some of the microsoft/msdn references it uses - a month may not be enough: The .NET Show: http://msdn.microsoft.com/theshow/Archive.asp .NET Architecture home page http://msdn.microsoft.com/architecture Patterns And Practices home page http://www.microsoft.com/resources/practices/default.mspx Application Architecture http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnanchor/html/Anch_EntDevAppArch.asp Application Architecture for .NET: Designing Applications and Services http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/distapp.asp http://www.microsoft.com/downloads/details.aspx?FamilyId=A08E4A09-7AE3-4942-B466-CC778A3BAB34&displaylang=en Designing Distributed Applications with Visual Studio .NET - Infrastructure Technologies http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconInfrastructureTechnologies.asp Design Guidelines for Class Library Developers http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpgenref/html/cpconNetFrameworkDesignGuidelines.asp Deploying .NET Applications: Lifecycle Guide http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/dalgroadmap.asp Visual Studio 6.0 - Developing for the Enterprise http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsintro/html/veovrwhatsnewinvisualstudioenterpriseedition.asp Monitoring in .NET Distributed Application Design http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/monitordotnet.asp Building an n-Tier Applications in .NET http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/buildntierapp.asp Sql Server home page http://www.microsoft.com/sql/default.asp Microsoft Solutions Framework homepage http://msdn.microsoft.com/vstudio/enterprise/msf/ Microsoft Solution Accelerator for Internet Storefront The Envisioning Phase http://msdn.microsoft.com/library/en-us/dnsolac/html/mo3_envphase.asp Defining The Vision http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnservice/html/service01102001.asp Unix Code Migration Guide: Chapter 3: "The Migration Process" http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnucmg/html/UCMGch03.asp Lessons From the Mainframe era http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlpro2k/html/sql00b15.asp Microsoft Global Software Development http://www.microsoft.com/globaldev/default.mspx Designing Accessible Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconDesigningAccessibleApplications.asp Certified for Windows Program http://www.microsoft.com/windowsserver2003/partners/isvs/cfw.mspx Performance Needs: Users and Administrators http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/performance_needs_users_and_administrators_2.asp Microsoft Windows NT High Availability Operations Guide: Implementing Systems for Reliability and Availability http://www.microsoft.com/NTServer/techresources/deployment/NTServer/HighAvail2.asp Reliabilty http://www.microsoft.com/technet/itsolutions/reliable/default.mspx Best Practices for Globalization and Localization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconbestglobalizationpractices.asp Building Secure ASP.NET Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/secnetlpMSDN.asp http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=055FF772-97FE-41B8-A58C-BF9C6593F25E 10 Immutable Laws of Security http://www.microsoft.com/technet/archive/community/columns/security/essays/10imlaws.mspx Best Practices for Enterprise Security http://www.microsoft.com/technet/archive/security/bestprac/bpent/bpentsec.mspx Web Services Specifications Index Page http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnglobspec/html/wsspecsover.asp Web Services Security Specifications Index Page http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnglobspec/html/wssecurspecindex.asp Planning for Integration with Existing Systems http://msdn.microsoft.com/library/default.asp?url=/library/en-us/comsrv2k/htm/cs_gs_planning_zncf.asp Volume Licensing Briefs Downloads http://www.microsoft.com/licensing/resources/volbrief.mspx Object Role Modeling, An Overview http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchvsea_ormoverview.asp Object Role Modeling (ORM) http://msdn.microsoft.com/theshow/Episode025/default.asp Visio-Based Database Modeling in Visual Studio .NET Enterprise http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvisio02/html/visdbcomp.asp Step-by-Step Guide to Reverse Engineering a Database in Visio 2000 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvisio00/html/VsRvEng.asp When All you want is an ER Diagram http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlpro01/html/sql01h1.asp .NET Interop: Get Ready for Microsoft .NET by Using Wrappers to Interact with COM-based Applications http://msdn.microsoft.com/msdnmag/issues/01/08/Interop/default.aspx Production Debugging for .NET Framework Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/dbgrm.asp Return of the Rich Client http://msdn.microsoft.com/msdnmag/issues/02/06/rich/ Exception Management in .NET http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/exceptdotnet.asp Author XML Schemas http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmtuttut6authoringschemas.asp Data Normalization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxcondatanormalization.asp Responsible Denormalization http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsqlmag2k/html/ResponsibleDenormalization.asp Designing the Components of an Application or Service http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/AppArchCh2.asp Designing Federated Database Servers http://msdn.microsoft.com/library/default.asp?url=/library/en-us/optimsql/cm_fedserv_4uib.asp Overview of System Performance http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/bdadotnetarch08.asp Microsoft Windows Management Instrumentation http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmi/html/msdn_wmiwp.asp Enterprise Templates: Building an Application Construction Kit http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchEnterpriseTemplatesBuildingApplicationConstructionKit.asp Enterprise Templates for Distributed Applications http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxoriEnterpriseTemplates.asp FxCop http://www.gotdotnet.com/team/fxcop/
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UAError Guest	Posted: Mon Oct 04, 2004 4:32 pm    Post subject: Re: Books for 70-300 "TomTom" <no_spam@nospamfordiscussion.com> wrote: Quote: I had your suggestion and read the book and web sites written by Terry Halpin on ORM. I took the test and I failed (and I am not blaming anyone). Well it wasn't necessarily your ORM that let you down. Even if you get exactly 2/3 of the exam right you still do not pass - and I doubt that ORM occupies 1/3 of the test's total value. The premise of doing a task, even on a small scale in 20 - 40 min that you usually accomplish by talking to people and by "incubating" the information can easily account for the initial shock and the loss in score. Quote: In ORM, are there cases where an object is a child of object and vice versa? In the book and web site, I didn't see those cases and I am confused. I'm not quite sure I quite understand your question. Object a is usually connected to object b through a predicate aRb with represents a single relationship between those two objects. However the concept of a "objectified association"/"objectified predicate"/"nested object type" exists. If you refer to Object Role Modeling, An Overview http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchvsea_ormoverview.asp you can see one in "Figure 9. The final conceptual schema" [Academic(empNr) teaching Subject(Code)] gets Rating(nr)+ The teaching predicate has become objectified. This relationship could have just as easily be represented as a ternary (if it wasn't for the fact that the objectified association is independent, more on that later) - but in this case the modeler has reasons to make the association Academic(empNr) teaches Subject(Code) strong enough to exist on its own - while objectification of the predicate creates the opportunity to associate the Rating directly with the (Academic teaching Subject). When sitting on the fence of deciding between a ternary and an objectified association Halpin gives the following advice: "Whenever the objectified predicate only plays one mandatory role, the flattened version is preferred of the nested version as it is more compact, natural and simplifies constraint expression. In all other cases, the nested version is preferred (e.g. choose nesting if the objectified predicate plays an optional role, or plays more than one role)." If you look closely on the graphical representation of the ORM schema you will see that each object is connected to a role box within a predicate by the connecting line. 1. "Academic" is connected to the "...teaches..." role of the "teaching" predicate. 2. "Subject" is connected to the "...is taught by..." role box of the "teaching" predicate 3. "Rating" is connected to "...is obtained by..." role box of the "gets" predicate. 4. "Teaching" objectifed association it connected to the "...gets..." role box of the "gets" predicate. However 5. "Academic" is NOT directly connected to the "Teaching" objectifed association. 6. "Subject" is NOT directly connected to the "Teaching" objectifed association. Note that objective association "Teaching" has an exclamation mark appended here because when functioning as an object it is independent i.e.: "An independent object type is a primitive object type whose fact roles are collectively optional. Independent object types have "!" " In this case the "Rating" is optional making "Teaching" independent mainly because a course is taught before its instructor is rated. In this particular case having "Teaching" independent its mandatory "...gets..." role is treated the same the same as if the role was optional - i.e. you HAVE to use an objectified association and you cannot use a ternary predicate. Quote: Are there cases where an object is a child of object and vice versa? Usually the phrase "an object is a child of object" automatically makes me think of the Composite pattern http://www.dofactory.com/Patterns/PatternComposite.aspx but we are talking ORM here, not patterns. Quote: Are there cases where an object is a child of object and vice versa? In UML the term "child" is sometimes (inaccurately) used in one of two situations - part objects in a whole-part composition - a subtype specializing a supertype (i.e. the derived class in a inheritance relationship). I don't think ORM pays any particular attention to composition/aggregation. And ORM isn't all that concerned about inheritance either - however the notion of a subtype is helpful in this regard: "Subtypes are introduced by finding an optional role (or more) that is only played by some well-defined subtype; that subtype is then realized and the role is transplanted to the new subtype and made mandatory. Subtypes must be associated with a definition that identifies the conditions on the supertype that identify it as also belonging to the subtype." Again refer to "Figure 9. The final conceptual schema" you can see three subtypes AND their associated rules: each Teacher is an Academic who teaches some Subject each Professor is an Academic who has rank 'P'. each TeachingProf is both a Teacher and a Professor. in effect the Academic, Teacher, Professor, and TeachingProf form an inheritance hierarchy. Note that the subtype connector DOES directly connect one object to another.
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TomTom Guest	Posted: Tue Oct 05, 2004 4:31 am    Post subject: Re: Books for 70-300 Thanks for your explanation. I think subtype was the parent-child relationship. By the way, Figure 9 seems to be nice in learning ORM. Thanks for letting me know about the web site. "UAError" <null@null.null> wrote in message news:9hk2m0lj09j69ebi5860emb2v5t2huuc68@4ax.com... Quote: "TomTom" <no_spam@nospamfordiscussion.com> wrote: I had your suggestion and read the book and web sites written by Terry Halpin on ORM. I took the test and I failed (and I am not blaming anyone). Well it wasn't necessarily your ORM that let you down. Even if you get exactly 2/3 of the exam right you still do not pass - and I doubt that ORM occupies 1/3 of the test's total value. The premise of doing a task, even on a small scale in 20 - 40 min that you usually accomplish by talking to people and by "incubating" the information can easily account for the initial shock and the loss in score. In ORM, are there cases where an object is a child of object and vice versa? In the book and web site, I didn't see those cases and I am confused. I'm not quite sure I quite understand your question. Object a is usually connected to object b through a predicate aRb with represents a single relationship between those two objects. However the concept of a "objectified association"/"objectified predicate"/"nested object type" exists. If you refer to Object Role Modeling, An Overview http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vstchvsea_ormoverview.asp you can see one in "Figure 9. The final conceptual schema" [Academic(empNr) teaching Subject(Code)] gets Rating(nr)+ The teaching predicate has become objectified. This relationship could have just as easily be represented as a ternary (if it wasn't for the fact that the objectified association is independent, more on that later) - but in this case the modeler has reasons to make the association Academic(empNr) teaches Subject(Code) strong enough to exist on its own - while objectification of the predicate creates the opportunity to associate the Rating directly with the (Academic teaching Subject). When sitting on the fence of deciding between a ternary and an objectified association Halpin gives the following advice: "Whenever the objectified predicate only plays one mandatory role, the flattened version is preferred of the nested version as it is more compact, natural and simplifies constraint expression. In all other cases, the nested version is preferred (e.g. choose nesting if the objectified predicate plays an optional role, or plays more than one role)." If you look closely on the graphical representation of the ORM schema you will see that each object is connected to a role box within a predicate by the connecting line. 1. "Academic" is connected to the "...teaches..." role of the "teaching" predicate. 2. "Subject" is connected to the "...is taught by..." role box of the "teaching" predicate 3. "Rating" is connected to "...is obtained by..." role box of the "gets" predicate. 4. "Teaching" objectifed association it connected to the "...gets..." role box of the "gets" predicate. However 5. "Academic" is NOT directly connected to the "Teaching" objectifed association. 6. "Subject" is NOT directly connected to the "Teaching" objectifed association. Note that objective association "Teaching" has an exclamation mark appended here because when functioning as an object it is independent i.e.: "An independent object type is a primitive object type whose fact roles are collectively optional. Independent object types have "!" " In this case the "Rating" is optional making "Teaching" independent mainly because a course is taught before its instructor is rated. In this particular case having "Teaching" independent its mandatory "...gets..." role is treated the same the same as if the role was optional - i.e. you HAVE to use an objectified association and you cannot use a ternary predicate. Are there cases where an object is a child of object and vice versa? Usually the phrase "an object is a child of object" automatically makes me think of the Composite pattern http://www.dofactory.com/Patterns/PatternComposite.aspx but we are talking ORM here, not patterns. Are there cases where an object is a child of object and vice versa? In UML the term "child" is sometimes (inaccurately) used in one of two situations - part objects in a whole-part composition - a subtype specializing a supertype (i.e. the derived class in a inheritance relationship). I don't think ORM pays any particular attention to composition/aggregation. And ORM isn't all that concerned about inheritance either - however the notion of a subtype is helpful in this regard: "Subtypes are introduced by finding an optional role (or more) that is only played by some well-defined subtype; that subtype is then realized and the role is transplanted to the new subtype and made mandatory. Subtypes must be associated with a definition that identifies the conditions on the supertype that identify it as also belonging to the subtype." Again refer to "Figure 9. The final conceptual schema" you can see three subtypes AND their associated rules: each Teacher is an Academic who teaches some Subject each Professor is an Academic who has rank 'P'. each TeachingProf is both a Teacher and a Professor. in effect the Academic, Teacher, Professor, and TeachingProf form an inheritance hierarchy. Note that the subtype connector DOES directly connect one object to another.
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UAError Guest	Posted: Tue Oct 05, 2004 2:31 pm    Post subject: Re: Books for 70-300 "TomTom" <no_spam@nospamfordiscussion.com> wrote: Quote: Thanks for your explanation. I think subtype was the parent-child relationship. By the way, Figure 9 seems to be nice in learning ORM. Thanks for letting me know about the web site. No Problem. Subtypes are part of Step 6 (of 7) of the Conceptual Shema Design Procedure (CSDP): Add value, subset, equality, exclusion and subtype constraints and are discussed in Chapter 6 of "Information Modeling and Relational Databases" http://www.amazon.com/exec/obidos/ASIN/1558606726 on the ORM website see also: Subtyping: conceptual and logical issues http://www.orm.net/pdf/Subtype.pdf Subtyping and Polymorphism in Object Role Modeling http://www.orm.net/pdf/SubPoly.pdf
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TomTom Guest	Posted: Wed Oct 06, 2004 9:31 am    Post subject: Re: Books for 70-300 Some more stuff to read. Thanks for introducing them. "UAError" <null@null.null> wrote in message news:dt65m0pkbsv25e1j31c88o7f60vltov53t@4ax.com... Quote: "TomTom" <no_spam@nospamfordiscussion.com> wrote: Thanks for your explanation. I think subtype was the parent-child relationship. By the way, Figure 9 seems to be nice in learning ORM. Thanks for letting me know about the web site. No Problem. Subtypes are part of Step 6 (of 7) of the Conceptual Shema Design Procedure (CSDP): Add value, subset, equality, exclusion and subtype constraints and are discussed in Chapter 6 of "Information Modeling and Relational Databases" http://www.amazon.com/exec/obidos/ASIN/1558606726 on the ORM website see also: Subtyping: conceptual and logical issues http://www.orm.net/pdf/Subtype.pdf Subtyping and Polymorphism in Object Role Modeling http://www.orm.net/pdf/SubPoly.pdf
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