Add-In, Highlight a state using XMI data.

[mapache]

Diagram type: some State Machine diagrams (more than one)
I want to develop an Add-In which does the following:

1) Export the project as XMI pushing a (custom-by-me-created) button.
2) The plugin receives messages (an exported xmi:id) from an external application.
3) Using the "exported xmi:id" of a state, highlight this given state in the state machine diagram/s.

Is all this possible?

Is there a correlation between the XMI:id and the Enterprise Architect Repository?

Thank you!,
kind regards.