Tango and WebWisdom delivery/storage system essentially work and have "proven" (to me) value of integration of synchronous and asynchronous systems
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Need many more experiments!
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But they do not have correct implementation for object web vision and have not implemented fully correct database and metadata standards
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For instance need replace Perl CGI scripts with JDBC interface to commercial database
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Need to take critical parts of Tango and make more robust and compatible with all browsers
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Some services such as assessment need a lot of work
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