Hi all, I am gauging for interest in adding the ability to define a data array element (such as a vector or n dimensional matrix) within the Dave-ML dtd. First thoughts would be to include an element like the "variableDef" maybe called "arrayDef" with attributes similar to the variableDef, but with additional attributes defining the dimensions for the array of data.
For example: For a vector of size (4x1): <arrayDef name="myDataVector_m" varID="myDataVector" units="m" dim1="4"> For a 2-D matrix of size (4x6): <arrayDef name="myDataVector_m" varID="myDataVector" units="m" dim1="4" dim2="6"> For a n-D matrix of size (4x6x3x...): <arrayDef name="myDataVector_m" varID="myDataVector" units="m" dim1="4" dim2="6" dim3="3" ...> The data associated with the array would need to be either stored as a data table or computed using Math-ML expressions. It would also be useful if an element of an array could refer to a variableDef or another arrayDef (depending on the dimension of the array). I would expect that if arrays were manipulated using Math-ML then the interpreter (such as Janus) would need to manage the compatibility checking - that is outside the XML file. One of the significant advantages of having an array element within Dave-ML would be the ability to encode matrix mathematics within the XML file - via Math-ML. I would find this particularly useful when processing axes transformation operations - eliminating the requirement for addressing the components individually. Another use would be the encoding of Inertia tensors and cg vectors as a single variable instead of having a variableDef for each component. I am sure there are many other uses. I await in anticipations for comments on this proposal. Geoff Brian Aircraft Performance and Flight Dynamics Air Vehicles Division Defence Science and Technology Organisation Ph: +61 (0) 3 9626 7318 IMPORTANT: This email remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the CRIMES ACT 1914. If you have received this email in error, you are requested to contact the sender and delete the email.
