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;

import org.w3c.dom.DOMException;

public interface SVGMatrix {
  public float getA( );
  public void      setA( float a )
                       throws DOMException;
  public float getB( );
  public void      setB( float b )
                       throws DOMException;
  public float getC( );
  public void      setC( float c )
                       throws DOMException;
  public float getD( );
  public void      setD( float d )
                       throws DOMException;
  public float getE( );
  public void      setE( float e )
                       throws DOMException;
  public float getF( );
  public void      setF( float f )
                       throws DOMException;

  public SVGMatrix multiply ( SVGMatrix secondMatrix );
  public SVGMatrix inverse (  )
                  throws SVGException;
  public SVGMatrix translate ( float x, float y );
  public SVGMatrix scale ( float scaleFactor );
  public SVGMatrix scaleNonUniform ( float scaleFactorX, float scaleFactorY );
  public SVGMatrix rotate ( float angle );
  public SVGMatrix rotateFromVector ( float x, float y )
                  throws SVGException;
  public SVGMatrix flipX (  );
  public SVGMatrix flipY (  );
  public SVGMatrix skewX ( float angle );
  public SVGMatrix skewY ( float angle );
}