, not a decimal point, so insert a leading
zero for purely fractional values (e.g. use 0.5 instead of .5 and -0.5
instead of -.5).
  </P
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="AEN150"
></A
><H3
><TT
CLASS="LITERAL"
>&#60;matrix&#62;</TT
></H3
><P
>This element holds four numerical expressions of an affine transformation.
At their simplest these will be four <TT
CLASS="LITERAL"
>&#60;double&#62;</TT
> elements
but they can also be more involved expressions.
  </P
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="AEN1