As per indian diplomacy, There is no any formal document, definition or criteria for strategic relationship. However long term interaction based on political, economic, defence, technology and historical factors with any country has a scope of it.

The area which is left out by Alliance and Treaty has also chance of becoming strategic relationship, provided that both parties declared so.

A declaration is necessary for strategic relationship. India has strategic relationships with more than 30 countries. It is very unlikely of becoming enemy countries and strategic partners at the same time.

Bilateral relationship is generally has economic purpose. They may be exchange different product like electricity, general commodities, or any defence equipment but purpose will be economic benefit of both countries only.

If this kind of relationship is appear between more...