[kepler-dev] XMLToken and RecordToken
jzhang at lternet.edu
Tue Dec 7 11:37:27 PST 2004
Dear Dr. Lee:
My name is Jianting Zhang and I'm doing my post-doc with SEEK project at
UNM. My background is in database and I'm learning Ptlemey/Kepler.
I noticed that there are XMLToken and RecordToken in Ptolemy. While I
understand the funtion of RecordType, it seems to me that XMLToken is
currently just a placeholder with little real functionality. Could you
elabarate a little bit about the design philosophy of XMLToken?
I'm working on workflow of geospatial data processing in Kepler which
involves many interfacing issues with crrent GIS/Remote Sensing processing
software, which in turn invovles user defined complex data types. Also I'm
interested in making the processing distributed by using dynamic(stubless)
Web services. At present, it seems that XML/GML is a good solution to link
GIS/RS-Web Services-Ptolemy/Kepler. This is the reason I'm intestered in
XMLToken in Ptolemy.
Since I didn't find desired functionality (accessing name/type/value pair in
an XML string and type checking) in XMLToken, I'm thinking maping DOM
hierchary to RecordType hierarchy, which is possible at least conceptually.
Alternatively, I can extend XMLToken. Would you comment which way might be
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