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From: Henning von Bargen <H.vonBargen@Triestram-Partner.de>
To: general@xml.apache.org
Subject: AW: AW: Reverse XSL:FO
Date: Sat, 22 Apr 2000 10:02:52 +0200
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> -----Urspr=FCngliche Nachricht-----
> Von:	Stefano Mazzocchi [SMTP:stefano@apache.org]
> Gesendet am:	Donnerstag, 20. April 2000 23:05
> An:	general@xml.apache.org
> Betreff:	Re: AW: Reverse XSL:FO
>=20
> Henning von Bargen wrote:
> >=20
> > There's a tool called ps2edit (an extension to ghostscript) that
promises
> > to convert files from PS or PDF to SVG, but I didn't test it.
> > >From SVG, why should you then want to use XSL:FO ?
> > SVG is a XML format in itself and you can use XSL to do whatever =
you
want.
>=20
> Like, for example, do neural OCR on the SVG vectors to get FO text =
using
> XSLT stylesheets? good luck :)

Why would this be necessary? SVG stores text elements as text, see some
examples
at http://www.adobe.com/web/features/svg/samples.html
for example this one (etchedGlass.svg), which displays the letters SVG =
with
a lot of
effects added (notice the <text> element at the bottom of the source):

<?xml version=3D"1.0"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 03December 1999//EN"
"http://www.w3.org/Graphics/SVG/SVG-19991203.dtd">
<svg xml:space=3D"preserve" width=3D"3in" height=3D"2in">
<defs>
  <filter id=3D"EtchedGlass" filterUnits=3D"objectBoundingBox" =
x=3D"-10%" y=3D"-10%"
width=3D"120%" height=3D"120%">
  <!--Copyright 1999 Adobe Systems. You may copy, modify, and =
distribute
this file, if you include this notice & do not charge for the =
distribution.
This file is provided "AS-IS" without warranties of any kind, including =
any
implied warranties.-->
    <feGaussianBlur in=3D"SourceAlpha" stdDeviation=3D"4" =
result=3D"blur"/>
    <feOffset in=3D"blur" dx=3D"10" dy=3D"8" =
result=3D"offsetBlurredAlpha"/>
    <feSpecularLighting in=3D"blur" surfaceScale=3D"5" =
specularConstant=3D"1"
specularExponent=3D"7" lightColor=3D"white" result=3D"specularOut">
      <fePointLight x=3D"-5000" y=3D"-10000" z=3D"20000"/>
      </feSpecularLighting>
    <feTurbulence type=3D"turbulence" baseFrequency=3D"0.01" =
numOctaves=3D"10"
result=3D"turb"/>
    <feColorMatrix type=3D"matrix" in=3D"turb" result=3D"turbulence" =
values=3D"1 0 0
0 0  1 0 0 0 0  1 0 0 0 0  0 0 0 0 1"/>
    <feComposite in=3D"turbulence" in2=3D"specularOut" operator=3D"in"
result=3D"specularOut"/>
    <feComposite in=3D"specularOut" in2=3D"SourceAlpha" operator=3D"in"
result=3D"specularOut"/>
    <feComposite in=3D"SourceGraphic" in2=3D"specularOut" =
operator=3D"arithmetic"
k1=3D"0" k2=3D"1" k3=3D"1.5" k4=3D"-.5" result=3D"litPaint"/>
    <feColorMatrix type=3D"matrix" in=3D"litPaint" result=3D"litPaint" =
values=3D"1 0
0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 0 .6"/>
    <feComposite in=3D"litPaint" in2=3D"SourceAlpha" operator=3D"in"
result=3D"litPaint"/>
    <feMerge>
      <feMergeNode in=3D"offsetBlurredAlpha"/>
      <feMergeNode in=3D"litPaint"/>
      </feMerge>
    </filter>
  <linearGradient id=3D"relativeLinear" =
gradientUnits=3D"objectBoundingBox"
x1=3D"0" y1=3D"1" x2=3D"0" y2=3D"0">
    <stop offset=3D"0" style=3D"stop-color:wheat"/>
    <stop offset=3D"1" style=3D"stop-color:skyblue"/>
    </linearGradient>
  </defs>
<g>
  <image style=3D"opacity:.3" x=3D"0" y=3D"0" width=3D"400" =
height=3D"200"
xlink:href=3D"snowboard.jpg"/>
  <text x=3D"20" y=3D"150"
style=3D"opacity:.7;font-family:'Times';font-size:180;filter:url(#Etched=
Glass)
;fill:url(#relativeLinear)">SVG</text>
  </g>
</svg>


>=20
> Converting PS to FO is not different from converting JPG to MathML, =
or
> WAV to VoxML.=20
>=20
> XSLT is great but not magic :)
>=20
> --=20
> Stefano Mazzocchi      One must still have chaos in oneself to be

Hey Stefano, you're right!
It's impossible (or at least, very very very difficult) to do such =
things
with pure XSLT or FO.
But theoretically, one could use an external program to do voice2text
recognition and
let it generate a text file, this could be included via uri:include ;-)