nce">Convenience Templates and <CODE>typedef</CODE>s</A></DT>
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<P>
    The fundamental building blocks of the Iostreams library are the concepts of a <A HREF="../concepts/source.html">Source</A>, which provides read access to a sequence of characters, a <A HREF="../concepts/sink.html">Sink</A>, which provides write access to a sequence of characters, an <A HREF="../concepts/input_filter.html">InputFilter</A>, which Filters input read from a Source, and an <A HREF="../conce