Basuki Tjahaja Purnama, known by his nickname Ahok, was jailed for two years earlier this month for insulting the Koran, a shock decision that has undermined a reputation for religious tolerance in the world's most populous Muslim- majority country.
Lawyers for Purnama, who is currently in detention, filed the appeal to the High Court in Jakarta. They believe the judges' decision did not properly take into account testimony from defence witnesses, lawyer Ronny Talapessy told AFP
The lawyers also urged the court to release Purnama, Jakarta's first non-Muslim governor for half a century and its first ethnic Chinese leader, on bail while his appeal is ongoing.
The sentence was widely criticised as too harsh after prosecutors had demanded that he be given just two years' probation.
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Prosecutors in the case have already filed an appeal against the decision to jail Purnama.
The appeal came as a group of UN human rights experts urged Indonesia to free the 50-year-old and repeal the country's blasphemy laws, which critics say have been repeatedly used to target minorities.
Purnama was hauled into court last year to face trial for allegedly insulting Islam while campaigning for re-election, after the claims sparked major protests in Jakarta.
He offended Muslims after quoting a passage from the Koran, which he said his opponents were using to trick people into voting against him. Some interpret the verse as meaning Muslims should not vote for non-Muslim leaders.
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