http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 

package org.w3c.dom.svg;

public interface SVGFEDisplacementMapElement extends 
               SVGElement,
               SVGFilterPrimitiveStandardAttributes {
  // Channel Selectors
  public static final short SVG_CHANNEL_UNKNOWN = 0;
  public static final short SVG_CHANNEL_R       = 1;
  public static final short SVG_CHANNEL_G       = 2;
  public static final short SVG_CHANNEL_B       = 3;
  public static final short SVG_CHANNEL_A       = 4;

  public SVGAnimatedString      getIn1( );
  public SVGAnimatedString      getIn2( );
  public SVGAnimatedNumber      getScale( );
  public SVGAnimatedEnumeration getXChannelSelector( );
  public SVGAnimatedEnumeration getYChannelSelector( );
}