By Dan Levine WASHINGTON (Reuters) - A U.S. appeals court on Wednesday closely questioned Google's claim that Oracle does not enjoy copyright protection over certain parts of the Java programming language. The issue, under review by the U.S. Court of Appeals for the Federal Circuit in Washington, is being closely watched by software developers in Silicon Valley. Google's Android operating system is the world's best-selling smartphone platform. Oracle sued Google in 2010, claiming that Google had improperly incorporated parts of Oracle's Java programming language into Android.



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