Unifying navigation model

A method comprising:

• operating one or more navigation applications residing on a first programmable machine in a presentation layer of a navigation model architecture, a navigation service module residing on the first programmable machine in an integration layer of the navigation model architecture, and a plurality of application sources residing on one or more additional programmable machines in a data layer of the navigation model architecture, the one or more additional programmable machines communicating over a network with the navigation service module on the first programmable machine, each of the application sources creating an application-specific hierarchy;
• implementing a connector interface on the one or more additional programmable machines, the connector interface being defined by the navigation service module and causing each of the plurality of application sources to provide one navigation connector to the navigation service for each of the plurality of application sources, each navigation connector providing one or more navigation nodes that represent data objects in the one of the plurality of application sources that provides the navigation connector;
• and
• uniting the navigation nodes to provide, via the one or more navigation applications, a homogeneous view of navigation information from the plurality of application sources by uniting the application-specific navigation hierarchies from each of the plurality of application sources into a unified, consistent application hierarchy.

An article comprising a machine-readable medium storing instructions operable to cause one or more machines to perform operations comprising:

• operating one or more navigation applications residing on a first programmable machine in a presentation layer of a navigation model architecture, a navigation service module residing on the first programmable machine in an integration layer of the navigation model architecture, and a plurality of application sources residing on one or more additional programmable machines in a data layer of the navigation model architecture, the one or more additional programmable machines communicating over a network with the navigation service module on the first programmable machine, each of the application sources creating an application-specific hierarchy;
• implementing a connector interface on the one or more additional programmable machines, the connector interface being defined by the navigation service module and causing each of the plurality of application sources to provide one navigation connector to the navigation service for each of the plurality of application sources, each navigation connector providing one or more navigation nodes that represent data objects in the one of the plurality of application sources that provides the navigation connector;
• and
• uniting the navigation nodes to provide, via the one or more navigation applications, a homogeneous view of navigation information from the plurality of application sources by uniting the application-specific navigation hierarchies from each of the plurality of application sources into a unified, consistent application hierarchy by merging two or more of the navigation nodes from two or more of the application sources that are related to a same issue.