I have some question about the meaning of the verb phrase "open up" in this yahoo article:
Here's why a once-hostile Arab country is talking about opening up ties with Israel
I am also not too sure about the usage of the adjective "open" in the same article:
Relations with Sudan — now a notable member of the Saudi anti-Iran coalition — would de-link regional diplomacy from the peace process with the Palestinians, potentially enabling more open relations with countries like Saudi Arabia and creating a precedent for future cooperation with Arab states.
What do "open up ties" and "more open relations" mean? Could they be technical jargon?