The INDEX attribute is optional and may be used to specify an index name.

INDEX 属性是可选的，可用于指定一个索引名。

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In the 11.70 UC2 and later versions, you can specify an index name directly.

在11.70 UC2及更新的版本中，可直接指定索引名。

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In the full-text index example above, this identifier would be the index name.

在上面的全文索引示例中，这个标识符是索引名称。

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If you want to play it safe, one smart choice would be to buy the Vanguard Total World Stock Index Fund, which, as the name implies, tracks an index of the global stock market.

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