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    <meta content='Figure15.11ExtrudedPlaygroundSlide.x3d' name='title'/>
    <meta content='Figure 15.11, The VRML 2.0 Sourcebook, Copyright [1997] By Andrea L. Ames, David R. Nadeau, and John L. Moreland' name='creator'/>
    <meta content='http://www.wiley.com/legacy/compbooks/vrml2sbk/ch15/15fig11.htm' name='reference'/>
    <meta content='Don Brutzman' name='translator'/>
    <meta content='20 August 2000' name='created'/>
    <meta content='14 January 2010' name='modified'/>
    <meta content='A playground slide built by extruding a half-circle cross section along a helical spine.' name='description'/>
    <meta content='http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter15-Extrusion/Figure15.11ExtrudedPlaygroundSlide.x3d' name='identifier'/>
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    <!-- Computational cost of Extrusion compared to IndexedFaceSet: quicker to download, takes time to calculate polygonal faces and normals during initial loading, equally fast at run time. -->
    <!-- Authoring capabilities of Extrusion compared to IndexedFaceSet: can be more complicated to express, but also can provide great detail with much less effort. -->
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