Layers of services

I am new to the ALDSP product, but have developed some concerns regarding the viability of a layered approach to the data services. Documentation and best practices indicate that one should create layers ontop of the physical data services. I.e. a logical layer to normalize the data types of physical data so that the data types are consistent, then a layer to join needed shapes, and then a layer to create specifics for the various subscribing applications. This all sounds great, except ... if I have to update any of underlying physical data sources (that is - change the shape of the underlying rdbms table), then my logical layers need to be "redrawn". Does this mean that my tediously drawn and connected logical layers are discarded and I have to start from scratch? How do I preserve some of the work (or all of the work) that was committed to design and implementation of the logical layers when updating the model?
Thanks,
SCott

update any of underlying physical data sources (that is - change the shape of the underlying rdbms table), then my logical layers need to be "redrawn". Only your physical layer "needs" to be redrawn (and then, only if columns are removed or altered, new columns would just be ignored). You don't "need" to change the other layers - although you probably want to - to access the new columns.
And how to keep the changes to a minimum... see
http://dev2dev.bea.com/wiki/bin/view/CodeShare/ALDSPQuickOverview#2_Frequently_Asked_Questions_Abo
In the integration layer, notice how the whole elements $c, $o, $l are returned. So if the CUSTOMER table has has new columns, you would re-import the physical data service (CUSTOMER.ds/CUSTOMER.xsd would change), and add those columns to the logical data service (Customer.ds/Customer.xsd would change) - and you wouldn't need to touch the integration layer or anything above (the higher layers would not need their schemas updated as they simply import Customer.xsd). If you really wanted to cut down on maintenance, you could simply skip the logical layer (but then you'd have to use the database names as-is in your integration and higher layers).

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    save this & Test it & RemortLogin
    3)
    Goto Tcode BD64 -- click on Change mode button
    click on create moduleview
    short text : xxxxxxxxxxxxxx
    Technical Neme : MODEL_ALV
    save this & Press ok
    select your just created modelview Name :'MODEL_ALV'.
    goto add message type
    Model Name : MODEL_ALV
    sender : ERP000
    Receiver : ERP800
    Message type :MATMAS
    save & Press Enter
    4) Goto Tcode BD82
    Give Model View : MODEL_ALV
    Partner system : ERP800
    execute this by press F8 Button
    it will gives you sending system port No :A000000015(Like)
    5) Goto Tcode BD64
    seelct the modelview
    goto >edit>modelview-->distribute
    press ok & Press enter
    6)goto Tcode : BD10 for Material sending
    Material : mat_001
    Message Type : MATMAS
    Logical System : ERP800
    and Execute
    7)goto Tcode : BD11 for Material Receiving
    Material : mat_001
    Message Type : MATMAS
    and Execute --> 1 request idoc created for message type Matmas
    press enter
    Here Master Idoc set for Messge type MATMAS-->press Enter
    1 Communication Idoc generated for Message Type
    this is your IDOC
    Change Pointers
    I know how to change the description of a material using ALE Change Pointers.
    I will give the following few steps
    1) Tcode BD61---> check the change pointers activated check box
    save and goback.
    2) Tcode BD50---> check the MATMAS check box save and comeback.
    3) Tcode BD51---> goto IDOC_INPUT_MATMAS01 select the checkbox save and comeback.
    4) Tcode BD52---> give message type : matmas press ok button.
    select all what ever you want and delete remaining fields.
    save & come back.
    5) 5) go to Tcode MM02 select one material and try to change the description and save it
    it will effects the target systems material desciption will also changes
    6) goto Tcode SE38 give program Name is : RBDMIDOC and Execute
    give Message type : MATMAS and Executte
    ALE/IDOC Status Codes/Messages
    01 Error --> Idoc Added
    30 Error --> Idoc ready for dispatch(ALE Service)
    then goto SE38 --> Execute the Program RBDMIDOC
    29 Error --> ALE Service Layer
    then goto SE38 --> Execute the Program RSEOUT00
    03 Error --> Data Passed to Port ok
    then goto SE38 --> Execute the Program RBDMOIND
    12 Error --> Dispatch ok
    Inbound Status Codes
    50 Error --> It will go for ALE Service Layer
    56 Error --> Idoc with Errors added
    51 Error --> Application Document not posted
    65 Error --> Error in ALE Service Layer
    for 51 or 56 Errors do the following steps
    goto WE19 > give the IDOC Number and Execute>
    Press on Inbound function Module
    for 65 Error --> goto SE38 --> Execute the Program RBDAPP01 then your getting 51 Error
    1)EDI
    Electronic Data Interchange
    Cross-company exchange of electronic data (for example business documents) between domestic and international business partners who use a variety of hardware, software, and communication services. The data involved is formatted according to predefined standards. In addition to this, SAP ALE technology is available for data exchange within a company.
    2) ALE
    A means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    ALE/ IDOC/ XML
    http://www.sapgenie.com/sapgenie/docs/ale_scenario_development_procedure.doc
    http://www.thespot4sap.com/Articles/SAP_XML_Business_Integration.asp
    http://help.sap.com/saphelp_srm30/helpdata/en/72/0fe1385bed2815e10000000a114084/content.htm
    Regards,
    karthik

  • ALE Enchancements

    Hi Friends, I am new to ALE. I want to know what is ALE and how we can implement enchancements in ALE. What may be issues that lead to enchancements. Please help me as much as you can.

    ALE (Application Linking and Enabling )
    ALE is technology for SAP mainly use to transfer data between SAP systems.
    A means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    Refer
    http://www.dataxstream.com/doclib/ALESuccessfullyLeverageIDocs.pdf
    http://www.erpgenie.com/sapgenie/docs/ale_scenario_development_procedure.doc
    ALE Configuration 1
    1 ALE Introduction – Transaction SALE
    2 The 3 ALE methods
    2.1 Push
    2.1.1 First create logical system (In SPRO / SALE)
    2.1.2 Assign Client to Logical System (In SPRO)
    2.1.3 Create RFC Destination – SM59
    2.1.4 Create Distribution Model – BD64
    2.1.5 Send Material – BD10 9
    2.1.6 Check IDOC sent – WE02
    2.2 Pull
    2.2.1 Create Model View – BD64
    2.2.2 Login to 810
    2.2.3 Get Material – BD11
    2.2.4 Check IDOCs – WE02
    2.2.5 Check Material – MM02
    2.3 Change Pointer
    2.3.1 Activate change pointers for message type – BD50
    2.3.2 Activate Change Pointers – BD61
    2.3.3 Execute RBDMIdoc – SE38
    2.3.4 Check IDOCs – WE02
    2.3.5 Check Material – MM02
    Check this link..for Enhancing IDocs of BAPI-ALE Interfaces
    http://help.sap.com/saphelp_nw04s/helpdata/en/78/21749151ce11d189570000e829fbbd/frameset.htm

  • What is ale and idoc  after small explanation

    plz send me reply

    Hi,
    Check this info.
    <b>ALE</b>
    ALE means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    Refer
    http://www.sappoint.com/abap/ale.pdf
    http://www.sappoint.com/abap/ale2.pdf
    Check this link ALE and EDI
    <b>IDOC</b>
    IDoc is a intermediate document to exchange data between two SAP Systems.
    *IDocs are structured ASCII files (or a virtual equivalent).
    *Electronic Interchange Document
    *They are the file format used by SAP R/3 to exchange data with foreign systems.
    *Data Is transmitted in ASCII format, i.e. human readable form
    *IDocs exchange messages
    *IDocs are used like classical interface files
    IDOC types are templates for specific message types depending on what is the business document, you want to exchange.
    WE30 - you can create a IDOC type.
    An IDOC with data, will have to be triggered by the application that is trying to send out the data.
    FOr testing you can use WE19.
    How to create idoc?
    *WE30 - you can create a IDOC type
    For more information in details on the same along with the examples can be viewed on:
    http://www.netweaverguru.com/EDI/HTML/IDocBook.htm#_Toc8400404
    http://help.sap.com/saphelp_erp2005/helpdata/en/0b/2a6620507d11d18ee90000e8366fc2/frameset.htm
    http://www.sappoint.com/presentation.html
    http://www.allsaplinks.com/idoc_search.html
    http://www.sapgenie.com/sapedi/idoc_abap.htm
    http://www.erpgenie.com/sapedi/idoc_abap.htm
    To Create Idoc we need to follow these steps:
    Create Segment ( WE31)
    Create Idoc Type ( WE30 )
    Create Message Type ( WE81 )
    Assign Idoc Type to Message Type ( WE82 )
    Creating a Segment
    Go to transaction code WE31
    Enter the name for your segment type and click on the Create icon
    Type the short text
    Enter the variable names and data elements
    Save it and go back
    Go to Edit -> Set Release
    Follow steps to create more number of segments
    Create IDOC Type
    Go to transaction code WE30
    Enter the Object Name, select Basic type and click Create icon
    Select the create new option and enter a description for your basic IDOC type and press enter
    Select the IDOC Name and click Create icon
    The system prompts us to enter a segment type and its attributes
    Choose the appropriate values and press Enter
    The system transfers the name of the segment type to the IDOC editor.
    Follow these steps to add more number of segments to Parent or as Parent-child relation
    Save it and go back
    Go to Edit -> Set release
    Create Message Type
    Go to transaction code WE81
    Change the details from Display mode to Change mode
    After selection, the system will give this message “The table is cross-client (see Help for further info)”. Press Enter
    Click New Entries to create new Message Type
    Fill details
    Save it and go back
    Assign Message Type to IDoc Type
    Go to transaction code WE82
    Change the details from Display mode to Change mode
    After selection, the system will give this message “The table is cross-client (see Help for further info)”. Press Enter.
    Click New Entries to create new Message Type.
    Fill details
    Save it and go back
    Check these out..
    Re: How to create IDOC
    Check below link. It will give the step by step procedure for IDOC creation.
    http://www.supinfo-projects.com/cn/2005/idocs_en/2/
    ALE/ IDOC
    http://help.sap.com/saphelp_erp2004/helpdata/en/dc/6b835943d711d1893e0000e8323c4f/content.htm
    http://www.sapgenie.com/sapgenie/docs/ale_scenario_development_procedure.doc
    http://edocs.bea.com/elink/adapter/r3/userhtm/ale.htm#1008419
    http://www.netweaverguru.com/EDI/HTML/IDocBook.htm
    http://www.sapgenie.com/sapedi/index.htm
    http://www.sappoint.com/abap/ale.pdf
    http://www.sappoint.com/abap/ale2.pdf
    http://www.sapgenie.com/sapedi/idoc_abap.htm
    http://help.sap.com/saphelp_erp2005/helpdata/en/0b/2a60bb507d11d18ee90000e8366fc2/frameset.htm
    http://help.sap.com/saphelp_erp2005/helpdata/en/78/217da751ce11d189570000e829fbbd/frameset.htm
    http://www.allsaplinks.com/idoc_sample.html
    http://www.sappoint.com/abap.html
    http://help.sap.com/saphelp_erp2004/helpdata/en/dc/6b835943d711d1893e0000e8323c4f/content.htm
    http://www.sapgenie.com/sapgenie/docs/ale_scenario_development_procedure.doc
    http://edocs.bea.com/elink/adapter/r3/userhtm/ale.htm#1008419
    http://www.netweaverguru.com/EDI/HTML/IDocBook.htm
    http://www.sapgenie.com/sapedi/index.htm
    http://www.allsaplinks.com/idoc_sample.html
    http://www.sapgenie.com/sapgenie/docs/ale_scenario_development_procedure.docs
    Hope this resolves your query.
    Reward all the helpful answers.
    Regards

  • ALE/IDOC material

    Hi Experts,
    I m new into ALE/IDOC technology and wht to know in depth and Full fledge. plz suggest me some documents.
    Thanx in advance

    Hi Abdul,
    Check this matter.
    1)EDI
    Electronic Data Interchange
    Cross-company exchange of electronic data (for example business documents) between domestic and international business partners who use a variety of hardware, software, and communication services. The data involved is formatted according to predefined standards. In addition to this, SAP ALE technology is available for data exchange within a company.
    Refer
    http://www.erpgenie.com/sapedi/index.htm
    2) ALE
    A means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    Refer
    http://www.sappoint.com/abap/ale.pdf
    http://www.sappoint.com/abap/ale2.pdf
    Check this link ALE and EDI
    Types of RFC.
    RFC:
    Remote Function Call (RFC) is the standard SAP interface for communication between SAP systems. The RFC calls a function to be executed in a remote system.
    Synchronous RFC:
    The first version of RFC is synchronous RFC (sRFC). This type of RFC executes the function call based on synchronous communication, which means that the systems involved must both be available at the time the call is made.
    Transactional RFC (tRFC) and Queued RFC (qRFC). tRFC is used mainly to transfer ALE Intermediate Documents (IDocs).
    Transactional RFC:
    If an error occurs during a synchronous remote function call, the system cannot tell at what point the error occurred (most crucially, whether the function module was actually processed in R/3 before the operation failed). Restarting a failed call is therefore a dangerous thing to do, since you risk duplicating a completed function call.
    To alleviate this problem, you can use transactional RFC, which guarantees that each function call you issue will only be executed once, even if you submit it repeatedly to the R/3 System. The system implements this safeguard by assigning a unique transaction ID (TID) to each transaction that you submit. When you attempt to process the transaction, the system checks whether that TID has already been processed. If it has, the transaction is ignored.
    Queued RFC:
    When you use transactional RFC, you cannot guarantee the order in which the function calls will be processed in the system (it is quite possible that one call might overtake another). For cases where you need to specify a particular processing order, you can use queued RFC, which is an extension of transactional RFC. In qRFC, you place each function call in a logical queue. A function call cannot be executed until all of its predecessors in the queue have been processed. Queued RFC calls are processed asynchronously
    For more information on RFC, please go through the link.
    http://help.sap.com/saphelp_nw04/helpdata/en/6f/1bd5b6a85b11d6b28500508b5d5211/content.htm
    In simple words, ALE is used within the organization and EDI is used betn. the business partners.
    For eg: in ALE, when you want other branches of your company to have the same data as your main branch. You transport the data through ALE methodology.
    Whereas, EDI is used for communication betn ur co. & bank or co. & transport co., etc.
    If the other end does not have SAP, then a middle layer like MERCATOR is used to convert SAP data to non-SAP data and vice-versa.
    The basic difference is that ALE is the SAP technology for communications and you do not have to depend on 3rd party sofywares for the communication. EDI is the technology which requires you to define/create a sub-system that enables data transfers and these subsystems are 3rd party tools.
    THe various types of RFCs used in the technology are
    1. Synchronous RFC
    2. Asynchronous RFC
    3. Transactional RFC (tRFC)
    You can refer these links for ALE and EDI.
    http://www.onestopsap.com/interview-Question/ale/
    http://www.onestopsap.com/interview-Question/edi/
    Hope this resolves your query.
    Reward all the helpful answers.
    Regards

  • ALE IDOC AND EDI

    Hi
    Could u pls explain whats the use of these terminology in SAP and what's the prequisites, configuration setting and how these worked.
    thanks

    Hi,
    Application Link Enabling:Means of creating and operating distributed applications.
    The purpose of Application Line Enabling is to guarantee a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications. Applications are integrated using synchronous and asynchronous communication and not using a central database.
    Application Link Enabling comprises the following three layers:
    Application services , Distribution services , Communication services.
    Intermediate document (IDoc) container for exchanging data between R/3, R/2 and non-SAP systems. ALE uses IDocs to exchange data between logical systems. Non-SAP systems can use IDocs as the standard interfacefor data transfer.
    IDocs are created when message types and (object) methods are distributed. The message type is the format in which the data for a specific business process is transferred.
    Electronic Data Interchange.
    Electronic exchange of structured data, such as business documents, between domestic and international business partners that use different hardware, software and communication services. For this purpose, the data involved is formatted according to predefined standards.
    In addition to this, the SAP ALE technology is available for data exchange within a company.
    Prase

  • Whats the dfference between IDOC, ALE and EDI?

    whats the dfference between IDOC, ALE and EDI?

    Hi,
    1)EDI
    Electronic Data Interchange
    Cross-company exchange of electronic data (for example business documents) between domestic and international business partners who use a variety of hardware, software, and communication services. The data involved is formatted according to predefined standards. In addition to this, SAP ALE technology is available for data exchange within a company.
    Refer
    http://www.erpgenie.com/sapedi/index.htm
    2) ALE
    A means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    Refer
    http://www.sappoint.com/abap/ale.pdf
    http://www.sappoint.com/abap/ale2.pdf
    Check this link ALE and EDI
    http://www.onestopsap.com/interview-Question/edi/
    IDocs act as data containers in an ALE scenario. They are just a format of storing application data and then transferred using ALE. Take a look at this for further details on ALE.
    http://www.sapgenie.com/ale/why_ale.htm and http://www.sapgenie.com/sapgenie/docs/ale_whitepaper.doc
    Check this link.
    http://www.sapgenie.com/sapedi/idoc_abap.htm
    http://www.henrikfrank.dk/abapexamples/IDOC/IDOC.htm
    http://help.sap.com/printdocu/core/Print46c/en/Data/Index_en.htm
    http://help.sap.com/saphelp_47x200/helpdata/en/0b/2a6095507d11d18ee90000e8366fc2/frameset.htm
    Regards,
    Priyanka.

  • BDC,ALE

    hi gurus
    I am narayan having 3 years of functional experience in SAP SD module.
    Now i am interesting to learn ABAP Concepts of BDC, ALE.
    so if any one please send me meterial of these concepts.
    my mail id is  :  <REMOVED BY MODERATOR>
    Thanks
    narayan
    Edited by: Alvaro Tejada Galindo on Mar 10, 2008 3:44 PM

    ALE (Application Linking and Enabling )
    ALE is technology for SAP mainly use to transfer data between SAP systems.
    A means of creating and operating distributed applications.
    Application Link Enabling (ALE) guarantees a distributed, but integrated, R/3 installation. This involves business-controlled message exchange using consistent data across loosely linked SAP applications.
    Applications are integrated using synchronous and asynchronous communication - not by using a central database.
    ALE consists of the following layers:
    Application services
    Distribution services
    Communication services
    Refer
    http://www.dataxstream.com/doclib/ALESuccessfullyLeverageIDocs.pdf
    http://www.erpgenie.com/sapgenie/docs/ale_scenario_development_procedure.doc
    ALE Configuration 1
    1 ALE Introduction – Transaction SALE
    2 The 3 ALE methods
    2.1 Push
    2.1.1 First create logical system (In SPRO / SALE)
    2.1.2 Assign Client to Logical System (In SPRO)
    2.1.3 Create RFC Destination – SM59
    2.1.4 Create Distribution Model – BD64
    2.1.5 Send Material – BD10 9
    2.1.6 Check IDOC sent – WE02
    2.2 Pull
    2.2.1 Create Model View – BD64
    2.2.2 Login to 810
    2.2.3 Get Material – BD11
    2.2.4 Check IDOCs – WE02
    2.2.5 Check Material – MM02
    2.3 Change Pointer
    2.3.1 Activate change pointers for message type – BD50
    2.3.2 Activate Change Pointers – BD61
    2.3.3 Execute RBDMIdoc – SE38
    2.3.4 Check IDOCs – WE02
    2.3.5 Check Material – MM02
    BDC
    The batch input program must build all of the input to execute the SAP transaction.
    Two main steps are required:
    • To build an internal table containing every screen and every field to be filled in during the execution of an SAP transaction.
    • To pass the table to SAP for processing.
    Prerequisite for Data Transfer Program
    Writing a Data Transfer Program involves following prerequisites:
    Analyzing data from local file
    Analyzing transaction
    Analyzing transaction involves following steps:
    • The transaction code, if you do not already know it.
    • Which fields require input i.e., mandatory.
    • Which fields can you allow to default to standard values.
    • The names, types, and lengths of the fields that are used by a transaction.
    • Screen number and Name of module pool program behind a particular transaction.
    To analyze a transaction::
    • Start the transaction by menu or by entering the transaction code in the command box.
    (You can determine the transaction name by choosing System – Status.)
    • Step through the transaction, entering the data will be required for processing your batch input data.
    • On each screen, note the program name and screen (dynpro) number.
    (dynpro = dyn + pro. Dyn = screen, pro = number)
    • Display these by choosing System – Status. The relevant fields are Program (dynpro) and Dynpro number. If pop-up windows occur during execution, you can get the program name and screen number by pressing F1 on any field or button on the screen.
    The technical info pop-up shows not only the field information but also the program and screen.
    • For each field, check box, and radio button on each screen, press F1 (help) and then choose Technical Info.
    Note the following information:
    The field name for batch input, which you’ll find in its own box.
    The length and data type of the field. You can display this information by double clicking on the Data Element field.
    • Find out the identification code for each function (button or menu) that you must execute to process the batch-input data (or to go to new screen).
    Place the cursor on the button or menu entry while holding down the left mouse button. Then press F1.
    In the pop-up window that follows, choose Technical info and note the code that is shown in the Function field.
    You can also run any function that is assigned to a function key by way of the function key number. To display the list of available function keys, click on the right mouse button. Note the key number that is assigned to the functions you want to run.
    Once you have program name, screen number, field name (screen field name), you can start writing.
    DATA TRANSFER program.
    Check out the link below: You will get all the info. to start with BDC
    http://help.sap.com/saphelp_erp2005/helpdata/en/fa/097119543b11d1898e0000e8322d00/frameset.htm
    http://www.sapbrain.com/TUTORIALS/TECHNICAL/BDC_tutorial.html
    http://www.sap-img.com/abap/learning-bdc-programming.htm
    http://www.sap-img.com/bdc.htm
    www.sappoint.com/abap/bdcconcept.pdf
    http://www.sap-img.com/abap/learning-bdc-programming.htm
    http://www.sapdevelopment.co.uk/bdc/bdchome.htm
    http://www.planetsap.com/bdc_main_page.htm
    Also chk this link
    bdc

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