H3><A NAME = "Index">Index class</A></H3>

The index class provides access to the objects by key.
Keys of any scalar or string type are supported. But in one index can contains keys only of one type. Index class extends Persistent class and so it is normal Persistent object. Index can be unique (duplicated keys are prohibited) or not unique.<P>

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<A NAME = "Index.drop">
<B>drop()</B>
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Delete index. This method removes all entries from index and deallocate index object.
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