docs/en-US/aws-ec2-requirements.xml

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<section id="aws-ec2-requirements">
    <title>Supported API Version</title>
    <itemizedlist>
        <listitem><para>The EC2 interface complies with Amazon's WDSL version dated November 15, 2010, available at
            <ulink url="http://ec2.amazonaws.com/doc/2010-11-15/">http://ec2.amazonaws.com/doc/2010-11-15/</ulink>.</para></listitem>
        <listitem><para>The interface is compatible with the EC2 command-line
            tools <emphasis>EC2 tools v. 1.3.6230</emphasis>, which can be downloaded at <ulink
            url="http://s3.amazonaws.com/ec2-downloads/ec2-api-tools-1.3-62308.zip">http://s3.amazonaws.com/ec2-downloads/ec2-api-tools-1.3-62308.zip</ulink>.</para>
        </listitem>
    </itemizedlist>
    <note><para>Work is underway to support a more recent version of the EC2 API</para></note>
</section>