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<!ELEMENT plot
( term*, title?, xlabel?, ylabel?, key?, axis,
label*, (curve+, label*)+ >
<!ATTLIST plot
height "200" NDATA num
width "200" NDATA num
bgcolor "xffffff" NDATA hexcolor
fgcolor "x000000" NDATA hexcolor
transparent (on|off) "off"
grid (on|off) "off"
border (on|off) "on"
font (tiny|small|medium|large|giant) "medium"
>
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type (postscript|gif|png) "gif"
>
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<!ELEMENT ylabel #NMTOKENS>
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<!ELEMENT position #PCDATA >
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>
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<!ATTLIST axis
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thickness "1" NDATA num
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xmax " 10.0" NDATA num
ymin "-10.0" NDATA num
ymax " 10.0" NDATA num
>
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<!ATTLIST label
xpos NDATA num #REQUIRED
ypos NDATA num #REQUIRED
justify (right|left|center) "center"
>
<!ELEMENT curve (function? | data+ ) >
<!ATTLIST curve
color "x000000" NDATA hexcolor
name #PCDATA #REQUIRED
linestyle (lines|linespoints|dots|points|steps) "lines"
>
<!ELEMENT function #PCDATA >
<!ELEMENT data #PCDATA >
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