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Background documentation Navigation Model  Locate the document in its SAP Library structure

Navigation is based on the following three-level model:

·        Data Level: Contains the navigation connectors that generate the navigation nodes and the navigation hierarchy. The portal comes with a roles connector, and you can create addition connectors in order to create additional navigation nodes and hierarchies.

·        Integration Level: Retrieves navigation nodes and hierarchies from the connectors and creates the final navigation hierarchy for each user. Also provides services, such as the look up of navigation nodes.

·        Visualization Level: Contains navigation iViews for displaying the navigation hierarchy for the current user and providing navigation links.

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Navigation data is retrieved as follows:

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       1.      The portal initializes the navigation service.

       2.      Navigation connectors are registered with the navigation service.

       3.      Navigation iViews call the navigation service to retrieve the navigation nodes, either initial nodes or specific nodes.

       4.      The navigation service retrieves the navigation information from the registered navigation connectors and returns navigation nodes to the navigation iViews. The navigation service preprocesses the request by sorting and merging the nodes.

       5.      Navigation iViews use the retrieved navigation nodes to display the navigation hierarchy.

 

 

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