Tuesday, November 6, 2007

Understanding BizTalk Server 2006 R2

Understanding BizTalk Server 2006 R2:


Introducing BizTalk Server 2006:

No application is an island. Whether we like it or not, tying systems together has become the norm. Yet connecting software is about more than just exchanging bytes. As organizations move toward a service-oriented world, the real goal—creating effective business processes that unite separate systems into a coherent whole—comes within reach.


BizTalk Server 2006 supports this goal. Like its predecessors, this latest release allows connecting diverse software, then graphically creating and modifying process logic that uses that software. The product also lets information workers monitor running processes, interact with trading partners, and perform other business-oriented tasks.


Built on the foundation of its predecessor, BizTalk Server 2004, this new release will look familiar to anyone who's used this earlier version. The most important new additions in BizTalk Server 2006 are:


Better support for deploying, monitoring, and managing applications.


Significantly simpler installation.


Improved capabilities for Business Activity Monitoring (BAM).


BizTalk Server 2006 also uses the latest releases of other Microsoft technologies. It's built on version

2.0 of the .NET Framework, for example, and its developer tools are hosted in Visual Studio 2005. For storage, the product can use SQL Server 2005, the latest version of Microsoft's flagship database product, or SQL Server 2000, the previous release. BizTalk Server 2006 can also run on 64-bit Windows, taking advantage of the larger memory and other benefits this new generation of hardware offers.



Combining different systems into effective business processes is a challenging problem. Accordingly, BizTalk Server 2006 includes a range of technologies. The figure below illustrates the product's major components.


Information Worker Technologies



As the figure suggests, the heart of the product is the BizTalk Server 2006 Engine. The engine has two main parts:


A messaging component that provides the ability to communicate with a range of other software. By relying on pluggable adapters for different kinds of communication, the engine can support a variety of protocols and data formats, including web services and many others.


Support for creating and running graphically-defined processes called
orchestrations. Built on top of the engine's messaging components, orchestrations implement the logic that drives all or part of a business process.


Several other technologies can also be used in concert with the engine, including:


A Business Rules Engine that allows evaluating complex sets of rules.


A Health and Activity Tracking tool that lets developers and administrators monitor and manage the engine and the orchestrations it runs.


An Enterprise Single Sign-on facility, providing the ability to map authentication information between Windows and non-Windows systems.


On top of this foundation, BizTalk Server 2006 provides a group of technologies that address the more business-oriented needs of information workers. Those technologies are:


Business Activity Monitoring, allowing information workers to monitor a running business process. The information is displayed in business rather than technical terms, and what gets displayed can be controlled directly by business people.


Business Activity Services, allowing information workers to set up and manage interactions with trading partners.


All of these technologies are focused on solving the problems inherent in using a diverse set of software to support automated business processes. The next section examines how these solutions might look.




How BizTalk Server 2006 Is Used:


The great majority of modern business processes depend at least in part on software. While some of these processes are supported by a single application, many others rely on diverse software systems. This software has commonly been created at different times, on different platforms, and using different technologies. Given this, automating those business processes requires connecting diverse systems.


Addressing this challenge goes by various names: business process automation (BPA), business process management (BPM), and others. Whatever it's called, two scenarios are most important for application integration. One is connecting applications within a single organization, commonly referred to as enterprise application integration (EAI). The other, called business-to-business (B2B) integration connects applications in different organizations.


The figure below shows a simple example of the core BizTalk Server 2006 engine applied to an EAI problem. In this scenario, an inventory application, perhaps running on an IBM mainframe, notices that the stock of an item is low and so issues a request to order more of that item. This request is sent to a BizTalk Server 2006 orchestration (step 1), which then issues a request to this organization's ERP application requesting a purchase order (step 2). The ERP application, which might be running on a Unix system, sends back the requested PO (step 3), and the BizTalk Server 2006 orchestration then informs a fulfillment application, perhaps built on Windows using the .NET Framework, that the item should be ordered (step 4).





BizTalk Server 2006 Architecture:

The following figure provides a high-level overview of the BizTalk Server architecture from a messaging perspective


In this simplified view, a message is received through a receive location defined in a given receive port. This message is processed by the receive location and then published to the MessageBox database, the main persistence and routing mechanism for BizTalk Server. The MessageBox evaluates active subscriptions and routes the message to those orchestrations and send ports with matching subscriptions. Orchestrations may process the message and publish messages through the MessageBox to a send port where it is pushed out to its final destination.

The following are key components involved in BizTalk Server message processing.

Receive Ports and Receive Locations

A receive port is a collection of one or more receive locations that define specific entry points into BizTalk Server. A receive location is the configuration of a single endpoint (URL) to receive messages. The location contains configuration information for both a receive adapter and a receive pipeline. The adapter is responsible for the transport and communications part of receiving a message. Examples include the File adapter and SOAP adapter, each of which receives messages from different types of sources. The receive pipeline is responsible for preparing the message for publishing into the MessageBox. A pipeline is a series of components that are executed in sequence, each providing specific processing to a message such as decryption/encryption, parsing, or validation.

Send Ports and Send Port Groups

A send port is the combination of a send pipeline and a send adapter. A send port group is a collection of send ports and works much like an e-mail distribution list. A message sent to a send port group will be sent to all send ports in that group. The send pipeline is used to prepare a message coming from BizTalk Server for transmission to another service. The send adapter is responsible for actually sending the message using a specific protocol such as SOAP, or FTP.

Orchestrations

Orchestrations can subscribe to (receive) and publish (send) messages through the MessageBox. In addition, orchestrations can construct new messages. Messages are received using the subscription and routing mechanism already discussed. When subscriptions are filled for orchestrations, a new instance is activated and the message is delivered, or in the case of instance subscriptions, the instance is rehydrated if necessary and the message are then delivered. When messages are sent from an orchestration, they are published to the MessageBox in the same manner as a message arriving at a receive location with the appropriate properties is inserted into the database for use in routing.

MessageBox Database

The heart of the publish/subscribe engine in BizTalk Server is the MessageBox database. The MessageBox is made up of two components: one or more Microsoft SQL Server databases and the Message Agent. The SQL Server database provides the persistence store for many things including messages, message properties, subscriptions, orchestration states, tracking data, and host queues for routing.

Hosts and Host Instances

A host is a logical representation of a Microsoft Windows process that executes BizTalk Server artifacts such as send ports and orchestrations. A host instance is the physical representation of a host on a specific server. A host can be either an in-process host, which means it is owned and managed by BizTalk Server, or an isolated host, which means that the BizTalk Server code is running in a process that is not controlled by BizTalk Server. A good example of an isolated host is Internet Information Services (IIS), which hosts the receive functionality of the HTTP and SOAP adapters. Hosts are defined for an entire BizTalk Server group; a collection of BizTalk Servers that share configuration, MessageBoxes, ports, and so on

Adapters:

Adapters are the communication interface for BizTalk to and from the outside world. They perform whatever communication semantics or protocols that the remote system requires, thus hiding any complexity that is required when interfacing with remote systems, particularly legacy ones.


Adapters are commonly referred to as bit shovelers because of the way they move the binary bits from the outside world into BizTalk and from BizTalk back out to the outside world, effectively feeding the BizTalk engine with work—like a fireman feeding coal into the engine of a steam train.


No conversion or translation of messages is performed by adapters; they purely bring the bits into BizTalk so that pipelines can then optionally perform any data translation, such as converting a flat file to an XML document. This chapter begins with an overview of the adapter architecture along with features offered to adapters, and then the remainder of the chapter discusses each of the mainstream adapters

SharePoint Server questions and answers

Frequently asked Questions for SharePoint Server

  1. What is the difference between Microsoft Office SharePoint Server 2007 for Internet sites and Microsoft Office SharePoint Server 2007?

    Microsoft Office SharePoint Server 2007 for Internet sites and Microsoft Office SharePoint Server 2007 have identical feature functionality. While the feature functionality is similar, the usage rights are different.

    If you are creating an Internet, or Extranet, facing website, it is recommended that you use Microsoft Office SharePoint Server 2007 for Internet sites which does not require the purchase client access licenses. Websites hosted using an "Internet sites" edition can only be used for Internet facing websites and all content, information, and applications must be accessible to non-employees. Websites hosted using an "Internet sites" edition cannot be accessed by employees creating, sharing, or collaborating on content which is solely for internal use only, such as an Intranet Portal scenario. See the previous section on licensing for more information on the usage scenarios.

  2. What suites of the 2007 Microsoft Office system work with Office SharePoint Server 2007?

    Office Outlook 2007 provides bidirectional offline synchronization with SharePoint document libraries, discussion groups, contacts, calendars, and tasks.

    Microsoft Office Groove 2007, included as part of Microsoft Office Enterprise 2007, will enable bidirectional offline synchronization with SharePoint document libraries.

    Features such as the document panel and the ability to publish to Excel Services will only be enabled when using Microsoft Office Professional Plus 2007or Office Enterprise 2007.

    Excel Services will only work with documents saved in the new Office Excel 2007 file format (XLSX).

  3. How do I invite users to join a Windows SharePoint Services Site? Is the site secure?

    SharePoint-based Web sites can be password-protected to restrict access to registered users, who are invited to join via e-mail. In addition, the site administrator can restrict certain members' roles by assigning different permission levels to view post and edit.

  4. Can I post any kind of document?

    You can post documents in many formats, including .pdf, .htm and .doc. In addition, if you are using Microsoft Office XP, you can save documents directly to your Windows SharePoint Services site.

  5. Can I download information directly from a SharePoint site to a personal digital assistant (PDA)?

    No you cannot. However, you can exchange contact information lists with Microsoft Outlook.

  6. How long does it take to set up the initial team Web site?

    It only takes a few minutes to create a complete Web site. Preformatted forms let you and your team members contribute to the site by filling out lists. Standard forms include announcements, events, contacts, tasks, surveys, discussions and links.

  7. Can I create custom templates?

    Yes you can. You can have templates for business plans, doctor's office, lawyer's office etc.

  8. How can I make my site public? By default, all sites are created private.

    If you want your site to be a public Web site, enable anonymous access for the entire site. Then you can give out your URL to anybody in your business card, e-mail or any other marketing material. The URL for your Web site will be:
    http:// yoursitename.wss.bcentral.com

    Hence, please take special care to name your site.
    These Web sites are ideal for information and knowledge intensive sites and/or sites where you need to have shared Web workspace.
    Remember: Under each parent Web site, you can create up to 10 sub-sites each with unique permissions, settings and security rights.

  9. How do the sub sites work?

    You can create a sub site for various categories. For example:
    * Departments - finance, marketing, IT
    * Products - electrical, mechanical, hydraulics
    * Projects - Trey Research, Department of Transportation, FDA
    * Team - Retention team, BPR team
    * Clients - new clients, old clients
    * Suppliers - Supplier 1, Supplier 2, Supplier 3
    * Customers - Customer A, Customer B, Customer C
    * Real estate - property A, property B

    The URLs for each will be, for example:
    * http://yoursitename.wss.bcentral.com/finance
    * http://yoursitename.wss.bcentral.com/marketing

    You can keep track of permissions for each team separately so that access is restricted while maintaining global access to the parent site.

  10. How do I make my site non-restricted?

    If you want your site to have anonymous access enabled (i.e., you want to treat it like any site on the Internet that does not ask you to provide a user name and password to see the content of the site), follow these simple steps:
    # Login as an administrator
    # Click on site settings
    # Click on Go to Site Administration
    # Click on Manage anonymous access
    # Choose one of the three conditions on what Anonymous users can access:
    ** Entire Web site
    ** Lists and libraries
    ** Nothing

    Default condition is nothing your site has restricted access. The default conditions allow you to create a secure site for your Web site.

  11. Can I get domain name for my Web site?

    Unfortunately, no. At this point, we don't offer domain names for SharePoint sites. But very soon we will be making this available for all our SharePoint site customers. Please keep checking this page for further update on this. Meanwhile, we suggest you go ahead and set up your site and create content for it.

  12. What are picture libraries?

    Picture libraries allow you to access a photo album and view it as a slide show or thumbnails or a film strip. You can have separate folder for each event, category, etc

  13. What are the advantages of a hosted SharePoint vs. one that is on an in-house server?

    * No hardware investment, i.e. lower costs
    * No software to download - ready to start from the word go
    * No IT resources - Anyone who has used a Web program like Hotmail can use it
    * Faster deployment

  14. Can I ask users outside of my organization to participate in my Windows SharePoint Services site?

    Yes. You can manage this process using the Administration Site Settings. Simply add users via their e-mail alias and assign permissions such as Reader or Contributor.

  15. Are there any IT requirements or downloads required to set up my SharePoint site?

    No. You do not need to download any code or plan for any IT support. Simply complete the on-line signup process and provide us your current and correct email address. Once you have successfully signed up and your site has been provisioned, we will send a confirmation to the email address you provided.

  16. I am located outside of the United States. Are there any restrictions or requirements for accessing the Windows SharePoint Services?

    No. There are no system or bandwidth limitations for international trial users. Additionally language packs have been installed which allow users to set up sub-webs in languages other than English. These include: Arabic, Danish, Dutch, Finnish, French, German, Hebrew, Italian, Japanese, Polish, Portuguese (Brazilian), Spanish and Swedish.

  17. Are there any browser recommendations?

    Yes. Microsoft recommends using the following browsers for viewing and editing Windows SharePoint Services sites: Microsoft Internet Explorer 5.01 with Service Pack 2, Microsoft Internet Explorer 5.5 with Service Pack 2, Internet Explorer 6, Netscape Navigator 6.2 or later.

  18. What security levels are assigned to users?

    Security levels are assigned by the administrator who is adding the user. There are four levels by default and additional levels can be composed as necessary.
    * Reader - Has read-only access to the Web site.
    * Contributor - Can add content to existing document libraries and lists.
    * Web Designer - Can create lists and document libraries and customize pages in the Web site.
    * Administrator - Has full control of the Web site.

  19. How secure are Windows SharePoint Services sites hosted by Microsoft?

    Microsoft Windows SharePoint Services Technical security measures provide firewall protection, intrusion detection, and web-publishing rules. The Microsoft operation center team tests and deploys software updates in order to maintain the highest level of security and software reliability. Software hot-fixes and service packs are tested and deployed based on their priority and level of risk. Security related hot-fixes are rapidly deployed into the environment to address current threats. A comprehensive software validation activity ensures software stability through regression testing prior to deployment.

  20. What is the difference between an Internet and an intranet site?

    An internet site is a normal site that anyone on the internet can access (e.g., www.msn.com, www.microsoft.com, etc.). You can set up a site for your company that can be accessed by anyone without any user name and password.

    An intranet (or internal network), though hosted on the Web, can only be accessed by people who are members of the network. They need to have a login and password that was assigned to them when they were added to the site by the site administrator.

  21. What is a workspace?

    A site or workspace is when you want a new place for collaborating on Web pages, lists and document libraries. For example, you might create a site to manage a new team or project, collaborate on a document or prepare for a meeting.

  22. What are the various kinds of roles the users can have?

    A user can be assigned one of the following roles
    * Reader - Has read-only access to the Web site.
    * Contributor - Can add content to existing document libraries and lists.
    * Web Designer - Can create lists and document libraries and customize pages in the Web site.
    * Administrator - Has full control of the Web site.

  23. Can more than one person use the same login?

    If the users sharing that login will have the same permissions and there is no fear of them sharing a password, then yes. Otherwise, this is discouraged.

  24. How customizable is the user-to-user access?

    User permissions apply to an entire Web, not to documents themselves. However, you can have additional sub webs that can optionally have their own permissions. Each user can be given any of four default roles. Additional roles can be defined by the administrator.

  25. Can each user have access to their own calendar?

    Yes there are two ways to do this,
    * by creating a calendar for each user, or
    * by creating a calendar with a view for each user

  26. How many files can I upload?

    There is no restriction in place except that any storage consumed beyond that provided by the base offering may have an additional monthly charge associated with them.

  27. What types of files can I upload / post to the site?

    The only files restricted are those ending with the following extensions: .asa, .asp, .ida, .idc, .idq. Microsoft reserves the right to add additional file types to this listing at any time. Also, no content that violates the terms of service may be uploaded or posted to the site.

  28. Can SharePoint be linked to an external data source?

    SharePoint data can be opened with Access and Excel as an external data source. Thus, SharePoint can be referenced as an external data source. SharePoint itself cannot reference an external data source.

  29. Can SharePoint be linked to a SQL database?

    This is possible via a custom application, but it not natively supported by SharePoint or SQL Server.

  30. Can I customize my Windows SharePoint Services site?

    YES! Windows SharePoint Services makes updating sites and their content from the browser easier than ever.

    SharePoint includes tools that let you create custom lists, calendars, page views, etc. You can apply a theme add List, Survey and Document Library Web Parts to a page create personal views change logos connect Web Parts and more.

    To fully customize your site, you can use Microsoft FrontPage 2003. Specifically, you can use FrontPage themes and shared borders, and also use FrontPage to create photo galleries and top ten lists, utilize standard usage reports, and integrate automatic Web content.

  31. Will Microsoft Office SharePoint Server 2007 run on a 64-bit version of Microsoft Windows?

    Windows SharePoint Services 3.0, Office SharePoint Server 2007, Office Forms Server 2007, and Office SharePoint Server 2007 for Search will support 64-bit versions of Windows Server 2003.

  32. How Office SharePoint Server 2007 can help you?


    Office SharePoint Server 2007 can help us:

    Manage content and streamline processes. Comprehensively manage and control unstructured content like Microsoft Office documents, Web pages, Portable Document Format file (PDF) files, and e-mail messages. Streamline business processes that are a drain on organizational productivity.

    Improve business insight. Monitor your business, enable better-informed decisions, and respond proactively to business events.

    Find and share information more simply. Find information and expertise wherever they are located. Share knowledge and simplify working with others within and across organizational boundaries.

    Empower IT to make a strategic impact. Increase responsiveness of IT to business needs and reduce the number of platforms that have to be maintained by supporting all the intranet, extranet, and Web applications across the enterprise with one integrated platform.

    Office SharePoint Server 2007 capabilities can help improve organizational effectiveness by connecting people, processes, and information.

    Office SharePoint Server 2007 provides these capabilities in an integrated server offering, so your organization doesn't have to integrate fragmented technology solutions itself.

  33. What are the features that the portal components of Office SharePoint Server 2007 include?

    The portal components of Office SharePoint Server 2007 include features that are especially useful for designing, deploying, and managing enterprise intranet portals, corporate Internet Web sites, and divisional portal sites. The portal components make it easier to connect to people within the organization who have the right skills, knowledge, and project experience.

  34. What are the advanced features of MOSS 2007?

    * User Interface (UI) and navigation enhancements
    * Document management enhancements
    * The new Workflow engine
    * Office 2007 Integration
    * New Web Parts
    * New Site-type templates
    * Enhancements to List technology
    * Web Content Management
    * Business Data Catalog
    * Search enhancements
    * Report Center
    * Records Management
    * Business Intelligence and Excel Server
    * Forms Server and InfoPath
    * The "Features" feature
    * Alternate authentication providers and Forms-based authentication

    What are the features of the new Content management in Office SharePoint 2007?

    The new and enhanced content management features in Office SharePoint Server 2007 fall within three areas:
    * Document management
    * Records management
    * Web content management
    Office SharePoint Server 2007 builds on the core document management functionality provided by Windows SharePoint Services 3.0, including check in and check out, versioning, metadata, and role-based granular access controls. Organizations can use this functionality to deliver enhanced authoring, business document processing, Web content management and publishing, records management, policy management, and support for multilingual publishing.

    Does a SharePoint Web site include search functionality?

    Yes. SharePoint Team Services provides a powerful text-based search feature that helps you find documents and information fast.

  35. Write the features of the search component of Office SharePoint Server 2007?

    The search component of Office SharePoint Server 2007 has been significantly enhanced by this release of SharePoint Products and Technologies. New features provide:
    * A consistent and familiar search experience.
    * Increased relevance of search results.
    * New functions to search for people and expertise.
    * Ability to index and search data in line-of-business applications and
    * Improved manageability and extensibility.

  36. What are the benefits of Microsoft Office SharePoint Server 2007?


    * Provide a simple, familiar, and consistent user experience.
    * Boost employee productivity by simplifying everyday business activities.
    * Help meet regulatory requirements through comprehensive control over content.
    * Effectively manage and repurpose content to gain increased business value.
    * Simplify organization-wide access to both structured and unstructured information across disparate systems.
    * Connect people with information and expertise.
    * Accelerate shared business processes across organizational boundaries.
    * Share business data without divulging sensitive information.
    * Enable people to make better-informed decisions by presenting business-critical information in one central location.
    * Provide a single, integrated platform to manage intranet, extranet, and Internet applications across the enterprise.

  37. Will SharePoint Portal Server and Team Services ever merge?

    The products will come together because they are both developed by the Office team.

  38. What does partial trust mean the Web Part developer?

    If an assembly is installed into the BIN directory, the code must be ensured that provides error handling in the event that required permissions are not available. Otherwise, unhandled security exceptions may cause the Web Part to fail and may affect page rendering on the page where the Web Part appears.

  39. How can I raise the trust level for assemblies installed in the BIN directory?

    Windows SharePoint Services can use any of the following three options from ASP.NET and the CLR to provide assemblies installed in the BIN directory with sufficient permissions. The following table outlines the implications and requirements for each option.

    Option Pros Cons

    Increase the trust level for the entire virtual server. For more information, see "Setting the trust level for a virtual server" Easy to implement.

    In a development environment, increasing the trust level allows you to test an assembly with increased permissions while allowing you to recompile assemblies directly into the BIN directory without resetting IIS. This option is least secure.

    This option affects all assemblies used by the virtual server.
    There is no guarantee the destination server has the required trust level. Therefore, Web Parts may not work once installed on the destination server.

    Create a custom policy file for your assemblies. For more information, see "How do I create a custom policy file?" Recommended approach.

    This option is most secure.

    An assembly can operate with a unique policy that meets the minimum permission requirements for the assembly.

    By creating a custom security policy, you can ensure the destination server can run your Web Parts.

    Requires the most configuration of all three options.
    Install your assemblies in the GAC

    Easy to implement.
    This grants Full trust to your assembly without affecting the trust level of assemblies installed in the BIN directory.

    This option is less secure.

    Assemblies installed in the GAC are available to all virtual servers and applications on a server running Windows SharePoint Services. This could represent a potential security risk as it potentially grants a higher level of permission to your assembly across a larger scope than necessary

    In a development environment, you must reset IIS every time you recompile assemblies.

    Licensing issues may arise due to the global availability of your assembly.

  40. Does SharePoint work with NFS?

    Yes and no. It can crawl documents on an NFS volume, but the SharePoint database or logs cannot be stored there.

  41. How is SharePoint Portal Server different from the Site Server?

    Site Server has search capabilities but these are more advanced using SharePoint. SPS uses digital dashboard technology which
    provides a nice interface for creating web parts and showing them on dashboards (pages). SS doesn't have anything as advanced as that. The biggest difference would be SPS document management features which also integrate with web folders and MS Office.

  42. What would you like to see in the next version of SharePoint?

    A few suggestions:

    # SPS and STS on same machine
    # Tree view of Categories and Folders
    # General Discussion Web Part
    # Personalization of Dashboards
    # Role Customization
    # Email to say WHY a document has been rejected for Approval
    # More ways to customize the interface
    # Backup and restore an individual Workspaces
    # Filter for Visio
    # Better way to track activity on SPS

  43. Why SharePoint is not a viable solution for enterprise wide deployments?

    Document management does not scale beyond a single server, but scales great within a single server. For example, a quad Xeon machine with 4GB of RAM works great for a document management server that has about 900,000 - 1,000,000 document, but if you need to store 50,000,000 document and want to have them all in one single workspace then it does not scale at all. If you need a scenario like this, you need to plan your deployment right and it should scale for you, it just does not right out of the box.
    If you are using your server as a portal and search server most for the most part it scales great. You can have many different servers crawl content sources and have separate servers searching and serving the content.

    If you have < 750,000 documents per server and fewer than 4 content sources and fewer than 50,000 users, SPS should scale just fine for your needs with the proper planning.

  44. What are the actual advantages of SharePoint Portal Services (SPS) over SharePoint Team Services (STS)?

    SharePoint Portal Services (SPS) has MUCH better document management. It has check-in, check-out, versioning, approval, publishing, subscriptions, categories, etc. STS does not have these features, or they are very scaled back. SharePoint team Services (SPS) has a better search engine, and can crawl multiple content sources. STS cannot. STS is easier to manage and much better for a team environment where there is not much Document Management going on. SPS is better for an organization, or where Document Management is crucial.

  45. How Does SharePoint work?

    The browser sends a DAV packet to IIS asking to perform a document check in. PKMDASL.DLL, an ISAPI DLL, parses the packet and sees that it has the proprietary INVOKE command. Because of the existence of this command, the packet is passed off to msdmserv.exe, who in turn processes the packet and uses EXOLEDB to access the WSS, perform the operation and send the results back to the user in the form of XML.