[om] OpenMath and Imaging

[Stephen P Braham]

The InterMath editor also does a lot of this too, of course,
and talks OpenMath :).

				Steve


Manfred Riem wrote:
> 
> Hi!
> 
>         I'm currently involved in a project that will render
> OpenMath objects. We're thinking about the following layout
> to achieve this.
> 
> 1. OpenMath XML --> 2. OpenMath Object  |
>                                         |-> 4. DisplayTree
>                  3. OpenMath Stylesheet |       |
>                                                 |
>                                          5. JPEG/GIF/Canvas
> 
> 1. The general input-layer as specified in the standard.
> 2. The general abstract-layer as specified in the standard.
> 3. An new 'stylesheet' language that knows about the
>    general layout of OpenMath objects. And know about
>    several operators.
> 4. The actual tree that will be used to do the rendering.
>    This tree is generated from both 2. and 3. and it
>    can optionally contain references back to the original
>    OpenMath Object tree.
> 5. The actual output in a file or in a Java Canvas.
> 
> Some notes about point 3:
>         So far I have 6 operators (image-classes). These
> operator classes are the basis for the rendering. The first
> question I've got is simple: "Do those operators cover about
> all there is in rendering OpenMath?"
> 
> Short explanation about the operators:
> 
> Type 0 operator:
>         renders the simple OpenMath constructs such
>         as OMI, OMF, OMSTR, OMVAR.
> 
> Type 1 operator:
>         renders a 'vector' with begin 'symbol' and
>         end symbol' and (optional) separator 'symbol'
> 
> Type 2 operator:
>         renders a summation (sigma), product (pi).
> 
> Type 3 operator:
>         renders a matrix.
> 
> Type 4 operator:
>         renders a polynomial.
> 
> Type 5 operator:
>         renders braces in a forms and shapes
>         ( brace, bracket, curly-brace, intervals ).
> 
> Type 6 operator:
>         renders a divide.
> 
> The second question I've got is more towards the
> 'stylesheet' language: "What kind of parameters
> should I expect?" So far I've only specified the
> general parameters like
>         1. Font (size, style, color).
>         2. Background
>         3. Abbreviation style.
> 
> We'll be using the JAI library to do the rendering
> because I supports on-demand rendering (of part)
> of the display-tree, so editors can be easily
> implemented then too. So anyone interested in
> editors, imaging please respond. Comments are
> welcomed!
> 
> Sorry for this lengthy message,
> 
> Greetz,
> 
> Manfred Riem
> Computer Science Student
> Eindhoven University of Technology.
> 
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