slide implementation

I have the following code:

<defs>
                  <symbol id="one" viewBox="0 0 20 20">
               <rect x="1" y="1" fill="#000000" width="8" height="20"/>
                  </symbol>
        </defs>

        <defs>
                  <symbol id="two" viewBox="0 0 20 20">
          <rect x="1" y="1" fill="#336699" width="8" height="8"/>
          </symbol>
        </defs>

i have declarated the transitions in the following way:

<defs id="transitions">
                <a:transition id="trans1" type="sometype" subType="sometype"
direction="sometype" dur="xs">
                        <a:param name="sections" value="somevalue" />
                </a:transition>
        </defs>

through the following code I want to have a slide presentation, but
this doesn't work. moreover, is there any other way to do it?.

        <g id="View" cursor="default" style="visibility:visible">
                <use x="0" y="0" width="100%" height="100%">
                        <animate attributeName="xlink:href"
a:transIn="trans1" from"#one"
to="#two" fill="freeze" begin="0s" />

                </use>

I will appreciate anybody's help.