At 7:04 AM -0600 11/30/05, Jon Berndt wrote: >I was noticing a gridded table definition (from the example on the DAVEML web >site): > > <functionDefn name="CL_FN"> > <griddedTable name="CL_TABLE"> > <breakpointRefs> > <bpRef bpID="MACH1"/> > <bpRef bpID="ALPHA1"/> > </breakpointRefs> > <confidenceBound value="95%"/> > <dataTable> <!-- Note: last breakpoint changes most rapidly --> > 9.5013e-01 6.1543e-01 5.7891e-02 1.5274e-02 8.3812e-01 1.9343e-01 > 2.3114e-01 7.9194e-01 3.5287e-01 7.4679e-01 1.9640e-02 6.8222e-01 > 6.0684e-01 9.2181e-01 8.1317e-01 4.4510e-01 6.8128e-01 3.0276e-01 > 4.8598e-01 7.3821e-01 9.8613e-03 9.3181e-01 3.7948e-01 5.4167e-01 > 8.9130e-01 1.7627e-01 1.3889e-01 4.6599e-01 8.3180e-01 1.5087e-01 > 7.6210e-01 4.0571e-01 2.0277e-01 4.1865e-01 5.0281e-01 6.9790e-01 > 4.5647e-01 9.3547e-01 1.9872e-01 8.4622e-01 7.0947e-01 3.7837e-01 > 1.8504e-02 9.1690e-01 6.0379e-01 5.2515e-01 4.2889e-01 8.6001e-01 > 8.2141e-01 4.1027e-01 2.7219e-01 2.0265e-01 3.0462e-01 8.5366e-01 > 4.4470e-01 8.9365e-01 1.9881e-01 6.7214e-01 1.8965e-01 5.9356e-01 > </dataTable> > </griddedTable> > </functionDefn> > </function> > >I'm not an XSL transform or XSD schema expert, but I believe the table data >will not be >transformable through XSL, since it is not keyed to specific elements. Is >there another >alternative definition for table data? > >The above representation of table data is what I use in the JSBSim table spec. >However, >I've recently been rethinking that. The tabular format above is nice because >it can easily >be edited and is easy on the eyes. However, I'm considering writing an XSL >transform that >would take table data and plot it using SVG. Not sure if that's specifically >possible, but >it would allow for some nice documentation to be produced. It might >effectively require >that an editor for table data should be available for creating flight models, >however - if >that's not already a requirement. > >Is there another table data spec format? Has anyone else dealt with using XSL >and SVG >together to plot data contained in a DAVEML flight model? > >Jon
Jon, There is another representation, but it has the same problem: ungridded data can be represented using the <dataPt> element; it gives the 'grid coordinates' and function value at those coordinates (the dependent value as a function of n independent values) but suffers from the same problem you mention. I suppose we should discuss an alternative presentation so that XSL can process a table into SVG (I've been wanting to look at this, too). As you point out, we need a table editor application, preferably in Java. See the third item on the DAVE-ML to-do list, <http://daveml.nasa.gov/future.html>. -- Bruce
