Representing Large Tabular Data Blocks
Hello, I am converting a number of existing proprietary file formats to a general XML format. The nature of the data I am working with is very large, very well formatted blocks of data. To give a point of reference, these files are used for data transfer within the CAD industry. The natural XML solution would be of course to embed each data value within an element or element attribute. Such as: <Point XYZ="324.1241 121.1214 -12.4521" NORMAL="0.0 0.0 1.0"/> However, when you replicate this point element a hundred thousand times or so, you get an enormous increase in file size. Thus raising the question of XML efficiency. One possible solution is to compress the resulting files. However, this is a very undesirable option in my case for a variety of reasons. Primarily compatibility and dependency issues. Another possible solution is to use a single element to bound all points, using some sort of delimiters to separate records, such as: <Point TEMPLATE="XYZ,NORMAL,DT" DELIM="|"> 324.1241 121.1241 -12.4521, 0.0 0.0 1.0, 0.707 0.707 0.0| This works to some extent, though it seems a pretty drastic break from standard XML data schemes. Unfortunately, to handle this nicely a customized parser is needed. Essentially, this method is providing a template or macro encoded in an element attribute that defines the contents of the element. Thus, if anyone could provide opinions / comments on the following issues, I'd be greatly appreciative: Is there a good way of representing bulk data embedded in an XML file, without relying on external compression for efficiency? Is the concept of using structured element contents a viable method in this case? Thanks a lot! Michael McLinn xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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